Add ConfigurationIgnoreAttribute - #126396

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rosebyte merged 8 commits into
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rosebyte:feature/configuration-ignore-attribute
Apr 14, 2026
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Add ConfigurationIgnoreAttribute#126396
rosebyte merged 8 commits into
dotnet:mainfrom
rosebyte:feature/configuration-ignore-attribute

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Fixes#125111

Add ConfigurationIgnoreAttribute so configuration binding can explicitly skip selected properties.

Changes

  • Added ConfigurationIgnoreAttribute to Microsoft.Extensions.Configuration.Abstractions (implementation + ref).
  • Reflection binder now skips ignored properties.
  • Constructor-parameter/property matching now treats ignored properties as non-bindable.
  • Source generator updated to parse and honor ignored properties.
  • Added tests for ignore behavior, ErrorOnUnknownConfiguration, and constructor matching with ignored properties.
  • Updated Abstractions README/PACKAGE examples.

Validation

  • dotnet build for Abstractions and Binder.
  • Binder unit tests: 296 passed, 0 failed.
  • Source-generation tests: 347 total, 0 failed (28 skipped by conditions).

CopilotAI review requested due to automatic review settings April 1, 2026 06:25
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Pull request overview

Adds a new ConfigurationIgnoreAttribute to the configuration abstractions and updates both the reflection-based binder and the source generator so selected properties can be explicitly excluded from binding.

Changes:

  • Introduces ConfigurationIgnoreAttribute in Microsoft.Extensions.Configuration.Abstractions (impl + ref surface).
  • Updates reflection binder and source generator to skip ignored properties during binding and constructor-parameter matching.
  • Adds/extends tests and updates package documentation examples to cover ignore behavior and ErrorOnUnknownConfiguration.

Reviewed changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 5 comments.

Show a summary per file
FileDescription
src/libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.TestClasses.csAdds a primary-ctor test type with an ignored property to validate ctor/property matching behavior.
src/libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.Helpers.csExtends ComplexOptions with an ignored property for binder test coverage.
src/libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.csAdds tests asserting ignored properties aren’t bound and don’t trip ErrorOnUnknownConfiguration, plus ctor-matching behavior.
src/libraries/Microsoft.Extensions.Configuration.Binder/src/ConfigurationBinder.csSkips ignored properties in reflection binding and in ctor-parameter/property equivalence checks; adds IsIgnoredProperty.
src/libraries/Microsoft.Extensions.Configuration.Binder/gen/Specs/TypeIndex.csEnsures generator considers property.IsIgnored when deciding if a property is bindable.
src/libraries/Microsoft.Extensions.Configuration.Binder/gen/Specs/Members/PropertySpec.csAdds IsIgnored flag to property spec model used by the generator.
src/libraries/Microsoft.Extensions.Configuration.Binder/gen/Parser/KnownTypeSymbols.csAdds symbol lookup for ConfigurationIgnoreAttribute for generator parsing.
src/libraries/Microsoft.Extensions.Configuration.Binder/gen/ConfigurationBindingGenerator.Parser.csParses [ConfigurationIgnore] and attempts to incorporate it into property/ctor matching.
src/libraries/Microsoft.Extensions.Configuration.Abstractions/src/PACKAGE.mdUpdates package example to mention/use [ConfigurationIgnore].
src/libraries/Microsoft.Extensions.Configuration.Abstractions/src/ConfigurationIgnoreAttribute.csAdds the new public attribute type.
src/libraries/Microsoft.Extensions.Configuration.Abstractions/ref/Microsoft.Extensions.Configuration.Abstractions.csAdds the attribute to the reference assembly surface area.
src/libraries/Microsoft.Extensions.Configuration.Abstractions/README.mdUpdates README example to mention/use [ConfigurationIgnore].

Comment threadsrc/libraries/Microsoft.Extensions.Configuration.Abstractions/src/PACKAGE.md
Comment threadsrc/libraries/Microsoft.Extensions.Configuration.Abstractions/README.md
Comment thread...raries/Microsoft.Extensions.Configuration.Binder/gen/ConfigurationBindingGenerator.Parser.cs
Comment thread...libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.cs
Comment thread...libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.cs
This was referenced Apr 1, 2026
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@tarekghtarekgh added this to the 11.0.0 milestone Apr 1, 2026
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Comment threadsrc/libraries/Microsoft.Extensions.Configuration.Binder/src/ConfigurationBinder.cs Outdated
@cincuranetcincuranet changed the title Add COnfigurationIgnoreAttributeAdd ConfigurationIgnoreAttributeApr 2, 2026
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Pull request overview

Copilot reviewed 12 out of 12 changed files in this pull request and generated 1 comment.

Comments suppressed due to low confidence (1)

src/libraries/Microsoft.Extensions.Configuration.Binder/src/ConfigurationBinder.cs:256

  • The constructor-parameter/property check is case-sensitive (p.Name == property.Name), but constructor parameter ↔ property equivalence is treated case-insensitively elsewhere (e.g., DoAllParametersHaveEquivalentProperties uses OrdinalIgnoreCase). This can cause properties whose names differ only by casing (common with primary ctors like "color" → "Color") to be bound again instead of going through the ctor-parameter path. Consider using an OrdinalIgnoreCase comparison here for consistency and to avoid unintended extra binding/setter side-effects.

if (constructorParameters is null || !constructorParameters.Any(p => p.Name == property.Name))
{
BindProperty(property, instance, configuration, options);
}

Comment threadsrc/libraries/Microsoft.Extensions.Configuration.Abstractions/README.md
@rosebyte
rosebyteforce-pushed the feature/configuration-ignore-attribute branch from bf00b83 to bac2378CompareApril 9, 2026 13:24
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Pull request overview

Copilot reviewed 12 out of 12 changed files in this pull request and generated no new comments.

CopilotAI review requested due to automatic review settings April 9, 2026 16:50
@rosebyte
rosebyte marked this pull request as ready for review April 9, 2026 16:51
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Pull request overview

Copilot reviewed 12 out of 12 changed files in this pull request and generated no new comments.

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Thanks!

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Pull request overview

Copilot reviewed 12 out of 12 changed files in this pull request and generated no new comments.

@build-analysisbuild-analysisBot mentioned this pull request Apr 13, 2026
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@rosebyte
rosebyte merged commit ebf02b3 into dotnet:mainApr 14, 2026
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@cincuranetcincuranetcincuranet approved these changes
@tarekghtarekghtarekgh approved these changes
@svicksvickAwaiting requested review from svick
@mrek-msftmrek-msftAwaiting requested review from mrek-msft

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Successfully merging this pull request may close these issues.

[API Proposal]: Add ConfigurationIgnoreAttribute to exclude properties from configuration binding

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@rosebyte@cincuranet@tarekgh
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
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}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

Skip to content
Add ConfigurationIgnoreAttribute - #126396
Merged
rosebyte merged 8 commits into
dotnet:mainfrom 
rosebyte:feature/configuration-ignore-attribute
Apr 14, 2026
Merged
Add ConfigurationIgnoreAttribute#126396
rosebyte merged 8 commits into
dotnet:mainfrom 
rosebyte:feature/configuration-ignore-attribute
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@rosebyte
@rosebyterosebyte
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Apr 1, 2026

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Fixes#125111
Add ConfigurationIgnoreAttribute so configuration binding can explicitly skip selected properties.
Changes
  • Added ConfigurationIgnoreAttribute to Microsoft.Extensions.Configuration.Abstractions (implementation + ref).
  • Reflection binder now skips ignored properties.
  • Constructor-parameter/property matching now treats ignored properties as non-bindable.
  • Source generator updated to parse and honor ignored properties.
  • Added tests for ignore behavior, ErrorOnUnknownConfiguration, and constructor matching with ignored properties.
  • Updated Abstractions README/PACKAGE examples.
Validation
  • dotnet build for Abstractions and Binder.
  • Binder unit tests: 296 passed, 0 failed.
  • Source-generation tests: 347 total, 0 failed (28 skipped by conditions).
CopilotAI
review requested due to automatic review settings
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Pull request overview
Adds a new ConfigurationIgnoreAttribute to the configuration abstractions and updates both the reflection-based binder and the source generator so selected properties can be explicitly excluded from binding.
Changes:
  • Introduces ConfigurationIgnoreAttribute in Microsoft.Extensions.Configuration.Abstractions (impl + ref surface).
  • Updates reflection binder and source generator to skip ignored properties during binding and constructor-parameter matching.
  • Adds/extends tests and updates package documentation examples to cover ignore behavior and ErrorOnUnknownConfiguration.
Reviewed changes
Copilot reviewed 12 out of 12 changed files in this pull request and generated 5 comments.
Show a summary per file
FileDescription
src/libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.TestClasses.csAdds a primary-ctor test type with an ignored property to validate ctor/property matching behavior.
src/libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.Helpers.csExtends ComplexOptions with an ignored property for binder test coverage.
src/libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.csAdds tests asserting ignored properties aren’t bound and don’t trip ErrorOnUnknownConfiguration, plus ctor-matching behavior.
src/libraries/Microsoft.Extensions.Configuration.Binder/src/ConfigurationBinder.csSkips ignored properties in reflection binding and in ctor-parameter/property equivalence checks; adds IsIgnoredProperty.
src/libraries/Microsoft.Extensions.Configuration.Binder/gen/Specs/TypeIndex.csEnsures generator considers property.IsIgnored when deciding if a property is bindable.
src/libraries/Microsoft.Extensions.Configuration.Binder/gen/Specs/Members/PropertySpec.csAdds IsIgnored flag to property spec model used by the generator.
src/libraries/Microsoft.Extensions.Configuration.Binder/gen/Parser/KnownTypeSymbols.csAdds symbol lookup for ConfigurationIgnoreAttribute for generator parsing.
src/libraries/Microsoft.Extensions.Configuration.Binder/gen/ConfigurationBindingGenerator.Parser.csParses [ConfigurationIgnore] and attempts to incorporate it into property/ctor matching.
src/libraries/Microsoft.Extensions.Configuration.Abstractions/src/PACKAGE.mdUpdates package example to mention/use [ConfigurationIgnore].
src/libraries/Microsoft.Extensions.Configuration.Abstractions/src/ConfigurationIgnoreAttribute.csAdds the new public attribute type.
src/libraries/Microsoft.Extensions.Configuration.Abstractions/ref/Microsoft.Extensions.Configuration.Abstractions.csAdds the attribute to the reference assembly surface area.
src/libraries/Microsoft.Extensions.Configuration.Abstractions/README.mdUpdates README example to mention/use [ConfigurationIgnore].
Comment threadsrc/libraries/Microsoft.Extensions.Configuration.Abstractions/src/PACKAGE.md
Comment threadsrc/libraries/Microsoft.Extensions.Configuration.Abstractions/README.md
Comment thread...raries/Microsoft.Extensions.Configuration.Binder/gen/ConfigurationBindingGenerator.Parser.cs
Comment thread...libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.cs
Comment thread...libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.cs

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@tarekghtarekgh
added this to the 11.0.0 milestone
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Comment threadsrc/libraries/Microsoft.Extensions.Configuration.Binder/src/ConfigurationBinder.cs
Outdated

@cincuranetcincuranet
changed the title
Add COnfigurationIgnoreAttributeAdd ConfigurationIgnoreAttributeApr 2, 2026
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Pull request overview
Copilot reviewed 12 out of 12 changed files in this pull request and generated 1 comment.
Comments suppressed due to low confidence (1)
src/libraries/Microsoft.Extensions.Configuration.Binder/src/ConfigurationBinder.cs:256
  • The constructor-parameter/property check is case-sensitive (p.Name == property.Name), but constructor parameter ↔ property equivalence is treated case-insensitively elsewhere (e.g., DoAllParametersHaveEquivalentProperties uses OrdinalIgnoreCase). This can cause properties whose names differ only by casing (common with primary ctors like "color" → "Color") to be bound again instead of going through the ctor-parameter path. Consider using an OrdinalIgnoreCase comparison here for consistency and to avoid unintended extra binding/setter side-effects.

if (constructorParameters is null || !constructorParameters.Any(p => p.Name == property.Name))
{
BindProperty(property, instance, configuration, options);
}

Comment threadsrc/libraries/Microsoft.Extensions.Configuration.Abstractions/README.md
@rosebyte
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Pull request overview
Copilot reviewed 12 out of 12 changed files in this pull request and generated no new comments.
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Pull request overview
Copilot reviewed 12 out of 12 changed files in this pull request and generated no new comments.
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Thanks!

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Pull request overview
Copilot reviewed 12 out of 12 changed files in this pull request and generated no new comments.
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@cincuranetcincuranetcincuranet approved these changes
@tarekghtarekghtarekgh approved these changes
@svicksvickAwaiting requested review from svick
@mrek-msftmrek-msftAwaiting requested review from mrek-msft

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Successfully merging this pull request may close these issues.

[API Proposal]: Add ConfigurationIgnoreAttribute to exclude properties from configuration binding


4 participants

@rosebyte@cincuranet@tarekgh

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
Add ConfigurationIgnoreAttribute - #126396
Merged
rosebyte merged 8 commits into
dotnet:mainfrom 
rosebyte:feature/configuration-ignore-attribute
Apr 14, 2026
Merged
Add ConfigurationIgnoreAttribute#126396
rosebyte merged 8 commits into
dotnet:mainfrom 
rosebyte:feature/configuration-ignore-attribute
Conversation
@rosebyte
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Apr 1, 2026

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Fixes#125111
Add ConfigurationIgnoreAttribute so configuration binding can explicitly skip selected properties.
Changes
  • Added ConfigurationIgnoreAttribute to Microsoft.Extensions.Configuration.Abstractions (implementation + ref).
  • Reflection binder now skips ignored properties.
  • Constructor-parameter/property matching now treats ignored properties as non-bindable.
  • Source generator updated to parse and honor ignored properties.
  • Added tests for ignore behavior, ErrorOnUnknownConfiguration, and constructor matching with ignored properties.
  • Updated Abstractions README/PACKAGE examples.
Validation
  • dotnet build for Abstractions and Binder.
  • Binder unit tests: 296 passed, 0 failed.
  • Source-generation tests: 347 total, 0 failed (28 skipped by conditions).
CopilotAI
review requested due to automatic review settings
April 1, 2026 06:25
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Pull request overview
Adds a new ConfigurationIgnoreAttribute to the configuration abstractions and updates both the reflection-based binder and the source generator so selected properties can be explicitly excluded from binding.
Changes:
  • Introduces ConfigurationIgnoreAttribute in Microsoft.Extensions.Configuration.Abstractions (impl + ref surface).
  • Updates reflection binder and source generator to skip ignored properties during binding and constructor-parameter matching.
  • Adds/extends tests and updates package documentation examples to cover ignore behavior and ErrorOnUnknownConfiguration.
Reviewed changes
Copilot reviewed 12 out of 12 changed files in this pull request and generated 5 comments.
Show a summary per file
FileDescription
src/libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.TestClasses.csAdds a primary-ctor test type with an ignored property to validate ctor/property matching behavior.
src/libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.Helpers.csExtends ComplexOptions with an ignored property for binder test coverage.
src/libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.csAdds tests asserting ignored properties aren’t bound and don’t trip ErrorOnUnknownConfiguration, plus ctor-matching behavior.
src/libraries/Microsoft.Extensions.Configuration.Binder/src/ConfigurationBinder.csSkips ignored properties in reflection binding and in ctor-parameter/property equivalence checks; adds IsIgnoredProperty.
src/libraries/Microsoft.Extensions.Configuration.Binder/gen/Specs/TypeIndex.csEnsures generator considers property.IsIgnored when deciding if a property is bindable.
src/libraries/Microsoft.Extensions.Configuration.Binder/gen/Specs/Members/PropertySpec.csAdds IsIgnored flag to property spec model used by the generator.
src/libraries/Microsoft.Extensions.Configuration.Binder/gen/Parser/KnownTypeSymbols.csAdds symbol lookup for ConfigurationIgnoreAttribute for generator parsing.
src/libraries/Microsoft.Extensions.Configuration.Binder/gen/ConfigurationBindingGenerator.Parser.csParses [ConfigurationIgnore] and attempts to incorporate it into property/ctor matching.
src/libraries/Microsoft.Extensions.Configuration.Abstractions/src/PACKAGE.mdUpdates package example to mention/use [ConfigurationIgnore].
src/libraries/Microsoft.Extensions.Configuration.Abstractions/src/ConfigurationIgnoreAttribute.csAdds the new public attribute type.
src/libraries/Microsoft.Extensions.Configuration.Abstractions/ref/Microsoft.Extensions.Configuration.Abstractions.csAdds the attribute to the reference assembly surface area.
src/libraries/Microsoft.Extensions.Configuration.Abstractions/README.mdUpdates README example to mention/use [ConfigurationIgnore].
Comment threadsrc/libraries/Microsoft.Extensions.Configuration.Abstractions/src/PACKAGE.md
Comment threadsrc/libraries/Microsoft.Extensions.Configuration.Abstractions/README.md
Comment thread...raries/Microsoft.Extensions.Configuration.Binder/gen/ConfigurationBindingGenerator.Parser.cs
Comment thread...libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.cs
Comment thread...libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.cs

This was referenced Apr 1, 2026

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@tarekghtarekgh
added this to the 11.0.0 milestone
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Comment threadsrc/libraries/Microsoft.Extensions.Configuration.Binder/src/ConfigurationBinder.cs
Outdated

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changed the title
Add COnfigurationIgnoreAttributeAdd ConfigurationIgnoreAttributeApr 2, 2026
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Pull request overview
Copilot reviewed 12 out of 12 changed files in this pull request and generated 1 comment.
Comments suppressed due to low confidence (1)
src/libraries/Microsoft.Extensions.Configuration.Binder/src/ConfigurationBinder.cs:256
  • The constructor-parameter/property check is case-sensitive (p.Name == property.Name), but constructor parameter ↔ property equivalence is treated case-insensitively elsewhere (e.g., DoAllParametersHaveEquivalentProperties uses OrdinalIgnoreCase). This can cause properties whose names differ only by casing (common with primary ctors like "color" → "Color") to be bound again instead of going through the ctor-parameter path. Consider using an OrdinalIgnoreCase comparison here for consistency and to avoid unintended extra binding/setter side-effects.

if (constructorParameters is null || !constructorParameters.Any(p => p.Name == property.Name))
{
BindProperty(property, instance, configuration, options);
}

Comment threadsrc/libraries/Microsoft.Extensions.Configuration.Abstractions/README.md
@rosebyte
rosebyteforce-pushed
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feature/configuration-ignore-attribute
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Pull request overview
Copilot reviewed 12 out of 12 changed files in this pull request and generated no new comments.
CopilotAI
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@rosebyte
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Pull request overview
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Thanks!

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Copilot reviewed 12 out of 12 changed files in this pull request and generated no new comments.
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[API Proposal]: Add ConfigurationIgnoreAttribute to exclude properties from configuration binding


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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
Add ConfigurationIgnoreAttribute - #126396
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rosebyte merged 8 commits into
dotnet:mainfrom 
rosebyte:feature/configuration-ignore-attribute
Apr 14, 2026
Merged
Add ConfigurationIgnoreAttribute#126396
rosebyte merged 8 commits into
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rosebyte:feature/configuration-ignore-attribute
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Fixes#125111
Add ConfigurationIgnoreAttribute so configuration binding can explicitly skip selected properties.
Changes
  • Added ConfigurationIgnoreAttribute to Microsoft.Extensions.Configuration.Abstractions (implementation + ref).
  • Reflection binder now skips ignored properties.
  • Constructor-parameter/property matching now treats ignored properties as non-bindable.
  • Source generator updated to parse and honor ignored properties.
  • Added tests for ignore behavior, ErrorOnUnknownConfiguration, and constructor matching with ignored properties.
  • Updated Abstractions README/PACKAGE examples.
Validation
  • dotnet build for Abstractions and Binder.
  • Binder unit tests: 296 passed, 0 failed.
  • Source-generation tests: 347 total, 0 failed (28 skipped by conditions).
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Pull request overview
Adds a new ConfigurationIgnoreAttribute to the configuration abstractions and updates both the reflection-based binder and the source generator so selected properties can be explicitly excluded from binding.
Changes:
  • Introduces ConfigurationIgnoreAttribute in Microsoft.Extensions.Configuration.Abstractions (impl + ref surface).
  • Updates reflection binder and source generator to skip ignored properties during binding and constructor-parameter matching.
  • Adds/extends tests and updates package documentation examples to cover ignore behavior and ErrorOnUnknownConfiguration.
Reviewed changes
Copilot reviewed 12 out of 12 changed files in this pull request and generated 5 comments.
Show a summary per file
FileDescription
src/libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.TestClasses.csAdds a primary-ctor test type with an ignored property to validate ctor/property matching behavior.
src/libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.Helpers.csExtends ComplexOptions with an ignored property for binder test coverage.
src/libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.csAdds tests asserting ignored properties aren’t bound and don’t trip ErrorOnUnknownConfiguration, plus ctor-matching behavior.
src/libraries/Microsoft.Extensions.Configuration.Binder/src/ConfigurationBinder.csSkips ignored properties in reflection binding and in ctor-parameter/property equivalence checks; adds IsIgnoredProperty.
src/libraries/Microsoft.Extensions.Configuration.Binder/gen/Specs/TypeIndex.csEnsures generator considers property.IsIgnored when deciding if a property is bindable.
src/libraries/Microsoft.Extensions.Configuration.Binder/gen/Specs/Members/PropertySpec.csAdds IsIgnored flag to property spec model used by the generator.
src/libraries/Microsoft.Extensions.Configuration.Binder/gen/Parser/KnownTypeSymbols.csAdds symbol lookup for ConfigurationIgnoreAttribute for generator parsing.
src/libraries/Microsoft.Extensions.Configuration.Binder/gen/ConfigurationBindingGenerator.Parser.csParses [ConfigurationIgnore] and attempts to incorporate it into property/ctor matching.
src/libraries/Microsoft.Extensions.Configuration.Abstractions/src/PACKAGE.mdUpdates package example to mention/use [ConfigurationIgnore].
src/libraries/Microsoft.Extensions.Configuration.Abstractions/src/ConfigurationIgnoreAttribute.csAdds the new public attribute type.
src/libraries/Microsoft.Extensions.Configuration.Abstractions/ref/Microsoft.Extensions.Configuration.Abstractions.csAdds the attribute to the reference assembly surface area.
src/libraries/Microsoft.Extensions.Configuration.Abstractions/README.mdUpdates README example to mention/use [ConfigurationIgnore].
Comment threadsrc/libraries/Microsoft.Extensions.Configuration.Abstractions/src/PACKAGE.md
Comment threadsrc/libraries/Microsoft.Extensions.Configuration.Abstractions/README.md
Comment thread...raries/Microsoft.Extensions.Configuration.Binder/gen/ConfigurationBindingGenerator.Parser.cs
Comment thread...libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.cs
Comment thread...libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.cs

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@tarekghtarekgh
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Comment threadsrc/libraries/Microsoft.Extensions.Configuration.Binder/src/ConfigurationBinder.cs
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@cincuranetcincuranet
changed the title
Add COnfigurationIgnoreAttributeAdd ConfigurationIgnoreAttributeApr 2, 2026
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Pull request overview
Copilot reviewed 12 out of 12 changed files in this pull request and generated 1 comment.
Comments suppressed due to low confidence (1)
src/libraries/Microsoft.Extensions.Configuration.Binder/src/ConfigurationBinder.cs:256
  • The constructor-parameter/property check is case-sensitive (p.Name == property.Name), but constructor parameter ↔ property equivalence is treated case-insensitively elsewhere (e.g., DoAllParametersHaveEquivalentProperties uses OrdinalIgnoreCase). This can cause properties whose names differ only by casing (common with primary ctors like "color" → "Color") to be bound again instead of going through the ctor-parameter path. Consider using an OrdinalIgnoreCase comparison here for consistency and to avoid unintended extra binding/setter side-effects.

if (constructorParameters is null || !constructorParameters.Any(p => p.Name == property.Name))
{
BindProperty(property, instance, configuration, options);
}

Comment threadsrc/libraries/Microsoft.Extensions.Configuration.Abstractions/README.md
@rosebyte
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Pull request overview
Copilot reviewed 12 out of 12 changed files in this pull request and generated no new comments.
CopilotAI
review requested due to automatic review settings
April 9, 2026 16:50
@rosebyte
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Pull request overview
Copilot reviewed 12 out of 12 changed files in this pull request and generated no new comments.
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Thanks!

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Pull request overview
Copilot reviewed 12 out of 12 changed files in this pull request and generated no new comments.
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merged commit ebf02b3
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Copilot left review comments
@cincuranetcincuranetcincuranet approved these changes
@tarekghtarekghtarekgh approved these changes
@svicksvickAwaiting requested review from svick
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Successfully merging this pull request may close these issues.

[API Proposal]: Add ConfigurationIgnoreAttribute to exclude properties from configuration binding


4 participants

@rosebyte@cincuranet@tarekgh

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
Add ConfigurationIgnoreAttribute - #126396
Merged
rosebyte merged 8 commits into
dotnet:mainfrom 
rosebyte:feature/configuration-ignore-attribute
Apr 14, 2026
Merged
Add ConfigurationIgnoreAttribute#126396
rosebyte merged 8 commits into
dotnet:mainfrom 
rosebyte:feature/configuration-ignore-attribute
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Apr 1, 2026

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Fixes#125111
Add ConfigurationIgnoreAttribute so configuration binding can explicitly skip selected properties.
Changes
  • Added ConfigurationIgnoreAttribute to Microsoft.Extensions.Configuration.Abstractions (implementation + ref).
  • Reflection binder now skips ignored properties.
  • Constructor-parameter/property matching now treats ignored properties as non-bindable.
  • Source generator updated to parse and honor ignored properties.
  • Added tests for ignore behavior, ErrorOnUnknownConfiguration, and constructor matching with ignored properties.
  • Updated Abstractions README/PACKAGE examples.
Validation
  • dotnet build for Abstractions and Binder.
  • Binder unit tests: 296 passed, 0 failed.
  • Source-generation tests: 347 total, 0 failed (28 skipped by conditions).
CopilotAI
review requested due to automatic review settings
April 1, 2026 06:25
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Tagging subscribers to this area: @dotnet/area-extensions-configuration

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Pull request overview
Adds a new ConfigurationIgnoreAttribute to the configuration abstractions and updates both the reflection-based binder and the source generator so selected properties can be explicitly excluded from binding.
Changes:
  • Introduces ConfigurationIgnoreAttribute in Microsoft.Extensions.Configuration.Abstractions (impl + ref surface).
  • Updates reflection binder and source generator to skip ignored properties during binding and constructor-parameter matching.
  • Adds/extends tests and updates package documentation examples to cover ignore behavior and ErrorOnUnknownConfiguration.
Reviewed changes
Copilot reviewed 12 out of 12 changed files in this pull request and generated 5 comments.
Show a summary per file
FileDescription
src/libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.TestClasses.csAdds a primary-ctor test type with an ignored property to validate ctor/property matching behavior.
src/libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.Helpers.csExtends ComplexOptions with an ignored property for binder test coverage.
src/libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.csAdds tests asserting ignored properties aren’t bound and don’t trip ErrorOnUnknownConfiguration, plus ctor-matching behavior.
src/libraries/Microsoft.Extensions.Configuration.Binder/src/ConfigurationBinder.csSkips ignored properties in reflection binding and in ctor-parameter/property equivalence checks; adds IsIgnoredProperty.
src/libraries/Microsoft.Extensions.Configuration.Binder/gen/Specs/TypeIndex.csEnsures generator considers property.IsIgnored when deciding if a property is bindable.
src/libraries/Microsoft.Extensions.Configuration.Binder/gen/Specs/Members/PropertySpec.csAdds IsIgnored flag to property spec model used by the generator.
src/libraries/Microsoft.Extensions.Configuration.Binder/gen/Parser/KnownTypeSymbols.csAdds symbol lookup for ConfigurationIgnoreAttribute for generator parsing.
src/libraries/Microsoft.Extensions.Configuration.Binder/gen/ConfigurationBindingGenerator.Parser.csParses [ConfigurationIgnore] and attempts to incorporate it into property/ctor matching.
src/libraries/Microsoft.Extensions.Configuration.Abstractions/src/PACKAGE.mdUpdates package example to mention/use [ConfigurationIgnore].
src/libraries/Microsoft.Extensions.Configuration.Abstractions/src/ConfigurationIgnoreAttribute.csAdds the new public attribute type.
src/libraries/Microsoft.Extensions.Configuration.Abstractions/ref/Microsoft.Extensions.Configuration.Abstractions.csAdds the attribute to the reference assembly surface area.
src/libraries/Microsoft.Extensions.Configuration.Abstractions/README.mdUpdates README example to mention/use [ConfigurationIgnore].
Comment threadsrc/libraries/Microsoft.Extensions.Configuration.Abstractions/src/PACKAGE.md
Comment threadsrc/libraries/Microsoft.Extensions.Configuration.Abstractions/README.md
Comment thread...raries/Microsoft.Extensions.Configuration.Binder/gen/ConfigurationBindingGenerator.Parser.cs
Comment thread...libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.cs
Comment thread...libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.cs

This was referenced Apr 1, 2026

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@tarekghtarekgh
added this to the 11.0.0 milestone
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Comment threadsrc/libraries/Microsoft.Extensions.Configuration.Binder/src/ConfigurationBinder.cs
Outdated

@cincuranetcincuranet
changed the title
Add COnfigurationIgnoreAttributeAdd ConfigurationIgnoreAttributeApr 2, 2026
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Pull request overview
Copilot reviewed 12 out of 12 changed files in this pull request and generated 1 comment.
Comments suppressed due to low confidence (1)
src/libraries/Microsoft.Extensions.Configuration.Binder/src/ConfigurationBinder.cs:256
  • The constructor-parameter/property check is case-sensitive (p.Name == property.Name), but constructor parameter ↔ property equivalence is treated case-insensitively elsewhere (e.g., DoAllParametersHaveEquivalentProperties uses OrdinalIgnoreCase). This can cause properties whose names differ only by casing (common with primary ctors like "color" → "Color") to be bound again instead of going through the ctor-parameter path. Consider using an OrdinalIgnoreCase comparison here for consistency and to avoid unintended extra binding/setter side-effects.

if (constructorParameters is null || !constructorParameters.Any(p => p.Name == property.Name))
{
BindProperty(property, instance, configuration, options);
}

Comment threadsrc/libraries/Microsoft.Extensions.Configuration.Abstractions/README.md
@rosebyte
rosebyteforce-pushed
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feature/configuration-ignore-attribute
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bac2378CompareApril 9, 2026 13:24
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Pull request overview
Copilot reviewed 12 out of 12 changed files in this pull request and generated no new comments.
CopilotAI
review requested due to automatic review settings
April 9, 2026 16:50
@rosebyte
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marked this pull request as ready for review
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Pull request overview
Copilot reviewed 12 out of 12 changed files in this pull request and generated no new comments.
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mentioned this pull request
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Thanks!

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Pull request overview
Copilot reviewed 12 out of 12 changed files in this pull request and generated no new comments.
@build-analysisbuild-analysisBot
mentioned this pull request
Apr 13, 2026

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@rosebyte
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merged commit ebf02b3
into
dotnet:mainApr 14, 2026

98 of 100 checks passed

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@cincuranetcincuranetcincuranet approved these changes
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@svicksvickAwaiting requested review from svick
@mrek-msftmrek-msftAwaiting requested review from mrek-msft

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Successfully merging this pull request may close these issues.

[API Proposal]: Add ConfigurationIgnoreAttribute to exclude properties from configuration binding


4 participants

@rosebyte@cincuranet@tarekgh

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
Add ConfigurationIgnoreAttribute - #126396
Merged
rosebyte merged 8 commits into
dotnet:mainfrom 
rosebyte:feature/configuration-ignore-attribute
Apr 14, 2026
Merged
Add ConfigurationIgnoreAttribute#126396
rosebyte merged 8 commits into
dotnet:mainfrom 
rosebyte:feature/configuration-ignore-attribute
Conversation
@rosebyte
@rosebyterosebyte
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Apr 1, 2026

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Fixes#125111
Add ConfigurationIgnoreAttribute so configuration binding can explicitly skip selected properties.
Changes
  • Added ConfigurationIgnoreAttribute to Microsoft.Extensions.Configuration.Abstractions (implementation + ref).
  • Reflection binder now skips ignored properties.
  • Constructor-parameter/property matching now treats ignored properties as non-bindable.
  • Source generator updated to parse and honor ignored properties.
  • Added tests for ignore behavior, ErrorOnUnknownConfiguration, and constructor matching with ignored properties.
  • Updated Abstractions README/PACKAGE examples.
Validation
  • dotnet build for Abstractions and Binder.
  • Binder unit tests: 296 passed, 0 failed.
  • Source-generation tests: 347 total, 0 failed (28 skipped by conditions).
CopilotAI
review requested due to automatic review settings
April 1, 2026 06:25
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Pull request overview
Adds a new ConfigurationIgnoreAttribute to the configuration abstractions and updates both the reflection-based binder and the source generator so selected properties can be explicitly excluded from binding.
Changes:
  • Introduces ConfigurationIgnoreAttribute in Microsoft.Extensions.Configuration.Abstractions (impl + ref surface).
  • Updates reflection binder and source generator to skip ignored properties during binding and constructor-parameter matching.
  • Adds/extends tests and updates package documentation examples to cover ignore behavior and ErrorOnUnknownConfiguration.
Reviewed changes
Copilot reviewed 12 out of 12 changed files in this pull request and generated 5 comments.
Show a summary per file
FileDescription
src/libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.TestClasses.csAdds a primary-ctor test type with an ignored property to validate ctor/property matching behavior.
src/libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.Helpers.csExtends ComplexOptions with an ignored property for binder test coverage.
src/libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.csAdds tests asserting ignored properties aren’t bound and don’t trip ErrorOnUnknownConfiguration, plus ctor-matching behavior.
src/libraries/Microsoft.Extensions.Configuration.Binder/src/ConfigurationBinder.csSkips ignored properties in reflection binding and in ctor-parameter/property equivalence checks; adds IsIgnoredProperty.
src/libraries/Microsoft.Extensions.Configuration.Binder/gen/Specs/TypeIndex.csEnsures generator considers property.IsIgnored when deciding if a property is bindable.
src/libraries/Microsoft.Extensions.Configuration.Binder/gen/Specs/Members/PropertySpec.csAdds IsIgnored flag to property spec model used by the generator.
src/libraries/Microsoft.Extensions.Configuration.Binder/gen/Parser/KnownTypeSymbols.csAdds symbol lookup for ConfigurationIgnoreAttribute for generator parsing.
src/libraries/Microsoft.Extensions.Configuration.Binder/gen/ConfigurationBindingGenerator.Parser.csParses [ConfigurationIgnore] and attempts to incorporate it into property/ctor matching.
src/libraries/Microsoft.Extensions.Configuration.Abstractions/src/PACKAGE.mdUpdates package example to mention/use [ConfigurationIgnore].
src/libraries/Microsoft.Extensions.Configuration.Abstractions/src/ConfigurationIgnoreAttribute.csAdds the new public attribute type.
src/libraries/Microsoft.Extensions.Configuration.Abstractions/ref/Microsoft.Extensions.Configuration.Abstractions.csAdds the attribute to the reference assembly surface area.
src/libraries/Microsoft.Extensions.Configuration.Abstractions/README.mdUpdates README example to mention/use [ConfigurationIgnore].
Comment threadsrc/libraries/Microsoft.Extensions.Configuration.Abstractions/src/PACKAGE.md
Comment threadsrc/libraries/Microsoft.Extensions.Configuration.Abstractions/README.md
Comment thread...raries/Microsoft.Extensions.Configuration.Binder/gen/ConfigurationBindingGenerator.Parser.cs
Comment thread...libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.cs
Comment thread...libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.cs

This was referenced Apr 1, 2026

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Comment threadsrc/libraries/Microsoft.Extensions.Configuration.Binder/src/ConfigurationBinder.cs
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Add COnfigurationIgnoreAttributeAdd ConfigurationIgnoreAttributeApr 2, 2026
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Pull request overview
Copilot reviewed 12 out of 12 changed files in this pull request and generated 1 comment.
Comments suppressed due to low confidence (1)
src/libraries/Microsoft.Extensions.Configuration.Binder/src/ConfigurationBinder.cs:256
  • The constructor-parameter/property check is case-sensitive (p.Name == property.Name), but constructor parameter ↔ property equivalence is treated case-insensitively elsewhere (e.g., DoAllParametersHaveEquivalentProperties uses OrdinalIgnoreCase). This can cause properties whose names differ only by casing (common with primary ctors like "color" → "Color") to be bound again instead of going through the ctor-parameter path. Consider using an OrdinalIgnoreCase comparison here for consistency and to avoid unintended extra binding/setter side-effects.

if (constructorParameters is null || !constructorParameters.Any(p => p.Name == property.Name))
{
BindProperty(property, instance, configuration, options);
}

Comment threadsrc/libraries/Microsoft.Extensions.Configuration.Abstractions/README.md
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Pull request overview
Copilot reviewed 12 out of 12 changed files in this pull request and generated no new comments.
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Pull request overview
Copilot reviewed 12 out of 12 changed files in this pull request and generated no new comments.
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Thanks!

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Pull request overview
Copilot reviewed 12 out of 12 changed files in this pull request and generated no new comments.
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[API Proposal]: Add ConfigurationIgnoreAttribute to exclude properties from configuration binding


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@rosebyte@cincuranet@tarekgh

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
Add ConfigurationIgnoreAttribute - #126396
Merged
rosebyte merged 8 commits into
dotnet:mainfrom 
rosebyte:feature/configuration-ignore-attribute
Apr 14, 2026
Merged
Add ConfigurationIgnoreAttribute#126396
rosebyte merged 8 commits into
dotnet:mainfrom 
rosebyte:feature/configuration-ignore-attribute
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@rosebyte
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Fixes#125111
Add ConfigurationIgnoreAttribute so configuration binding can explicitly skip selected properties.
Changes
  • Added ConfigurationIgnoreAttribute to Microsoft.Extensions.Configuration.Abstractions (implementation + ref).
  • Reflection binder now skips ignored properties.
  • Constructor-parameter/property matching now treats ignored properties as non-bindable.
  • Source generator updated to parse and honor ignored properties.
  • Added tests for ignore behavior, ErrorOnUnknownConfiguration, and constructor matching with ignored properties.
  • Updated Abstractions README/PACKAGE examples.
Validation
  • dotnet build for Abstractions and Binder.
  • Binder unit tests: 296 passed, 0 failed.
  • Source-generation tests: 347 total, 0 failed (28 skipped by conditions).
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Pull request overview
Adds a new ConfigurationIgnoreAttribute to the configuration abstractions and updates both the reflection-based binder and the source generator so selected properties can be explicitly excluded from binding.
Changes:
  • Introduces ConfigurationIgnoreAttribute in Microsoft.Extensions.Configuration.Abstractions (impl + ref surface).
  • Updates reflection binder and source generator to skip ignored properties during binding and constructor-parameter matching.
  • Adds/extends tests and updates package documentation examples to cover ignore behavior and ErrorOnUnknownConfiguration.
Reviewed changes
Copilot reviewed 12 out of 12 changed files in this pull request and generated 5 comments.
Show a summary per file
FileDescription
src/libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.TestClasses.csAdds a primary-ctor test type with an ignored property to validate ctor/property matching behavior.
src/libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.Helpers.csExtends ComplexOptions with an ignored property for binder test coverage.
src/libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.csAdds tests asserting ignored properties aren’t bound and don’t trip ErrorOnUnknownConfiguration, plus ctor-matching behavior.
src/libraries/Microsoft.Extensions.Configuration.Binder/src/ConfigurationBinder.csSkips ignored properties in reflection binding and in ctor-parameter/property equivalence checks; adds IsIgnoredProperty.
src/libraries/Microsoft.Extensions.Configuration.Binder/gen/Specs/TypeIndex.csEnsures generator considers property.IsIgnored when deciding if a property is bindable.
src/libraries/Microsoft.Extensions.Configuration.Binder/gen/Specs/Members/PropertySpec.csAdds IsIgnored flag to property spec model used by the generator.
src/libraries/Microsoft.Extensions.Configuration.Binder/gen/Parser/KnownTypeSymbols.csAdds symbol lookup for ConfigurationIgnoreAttribute for generator parsing.
src/libraries/Microsoft.Extensions.Configuration.Binder/gen/ConfigurationBindingGenerator.Parser.csParses [ConfigurationIgnore] and attempts to incorporate it into property/ctor matching.
src/libraries/Microsoft.Extensions.Configuration.Abstractions/src/PACKAGE.mdUpdates package example to mention/use [ConfigurationIgnore].
src/libraries/Microsoft.Extensions.Configuration.Abstractions/src/ConfigurationIgnoreAttribute.csAdds the new public attribute type.
src/libraries/Microsoft.Extensions.Configuration.Abstractions/ref/Microsoft.Extensions.Configuration.Abstractions.csAdds the attribute to the reference assembly surface area.
src/libraries/Microsoft.Extensions.Configuration.Abstractions/README.mdUpdates README example to mention/use [ConfigurationIgnore].
Comment threadsrc/libraries/Microsoft.Extensions.Configuration.Abstractions/src/PACKAGE.md
Comment threadsrc/libraries/Microsoft.Extensions.Configuration.Abstractions/README.md
Comment thread...raries/Microsoft.Extensions.Configuration.Binder/gen/ConfigurationBindingGenerator.Parser.cs
Comment thread...libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.cs
Comment thread...libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.cs

This was referenced Apr 1, 2026

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@tarekghtarekgh
added this to the 11.0.0 milestone
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Comment threadsrc/libraries/Microsoft.Extensions.Configuration.Binder/src/ConfigurationBinder.cs
Outdated

@cincuranetcincuranet
changed the title
Add COnfigurationIgnoreAttributeAdd ConfigurationIgnoreAttributeApr 2, 2026
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Pull request overview
Copilot reviewed 12 out of 12 changed files in this pull request and generated 1 comment.
Comments suppressed due to low confidence (1)
src/libraries/Microsoft.Extensions.Configuration.Binder/src/ConfigurationBinder.cs:256
  • The constructor-parameter/property check is case-sensitive (p.Name == property.Name), but constructor parameter ↔ property equivalence is treated case-insensitively elsewhere (e.g., DoAllParametersHaveEquivalentProperties uses OrdinalIgnoreCase). This can cause properties whose names differ only by casing (common with primary ctors like "color" → "Color") to be bound again instead of going through the ctor-parameter path. Consider using an OrdinalIgnoreCase comparison here for consistency and to avoid unintended extra binding/setter side-effects.

if (constructorParameters is null || !constructorParameters.Any(p => p.Name == property.Name))
{
BindProperty(property, instance, configuration, options);
}

Comment threadsrc/libraries/Microsoft.Extensions.Configuration.Abstractions/README.md
@rosebyte
rosebyteforce-pushed
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feature/configuration-ignore-attribute
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Pull request overview
Copilot reviewed 12 out of 12 changed files in this pull request and generated no new comments.
CopilotAI
review requested due to automatic review settings
April 9, 2026 16:50
@rosebyte
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Pull request overview
Copilot reviewed 12 out of 12 changed files in this pull request and generated no new comments.
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Thanks!

This was referenced Apr 9, 2026

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Pull request overview
Copilot reviewed 12 out of 12 changed files in this pull request and generated no new comments.
@build-analysisbuild-analysisBot
mentioned this pull request
Apr 13, 2026

Closed

@rosebyte
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merged commit ebf02b3
into
dotnet:mainApr 14, 2026

98 of 100 checks passed

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Copilot left review comments
@cincuranetcincuranetcincuranet approved these changes
@tarekghtarekghtarekgh approved these changes
@svicksvickAwaiting requested review from svick
@mrek-msftmrek-msftAwaiting requested review from mrek-msft

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Successfully merging this pull request may close these issues.

[API Proposal]: Add ConfigurationIgnoreAttribute to exclude properties from configuration binding


4 participants

@rosebyte@cincuranet@tarekgh

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

Skip to content
Add ConfigurationIgnoreAttribute - #126396
Merged
rosebyte merged 8 commits into
dotnet:mainfrom 
rosebyte:feature/configuration-ignore-attribute
Apr 14, 2026
Merged
Add ConfigurationIgnoreAttribute#126396
rosebyte merged 8 commits into
dotnet:mainfrom 
rosebyte:feature/configuration-ignore-attribute
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Apr 1, 2026

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Fixes#125111
Add ConfigurationIgnoreAttribute so configuration binding can explicitly skip selected properties.
Changes
  • Added ConfigurationIgnoreAttribute to Microsoft.Extensions.Configuration.Abstractions (implementation + ref).
  • Reflection binder now skips ignored properties.
  • Constructor-parameter/property matching now treats ignored properties as non-bindable.
  • Source generator updated to parse and honor ignored properties.
  • Added tests for ignore behavior, ErrorOnUnknownConfiguration, and constructor matching with ignored properties.
  • Updated Abstractions README/PACKAGE examples.
Validation
  • dotnet build for Abstractions and Binder.
  • Binder unit tests: 296 passed, 0 failed.
  • Source-generation tests: 347 total, 0 failed (28 skipped by conditions).
CopilotAI
review requested due to automatic review settings
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Pull request overview
Adds a new ConfigurationIgnoreAttribute to the configuration abstractions and updates both the reflection-based binder and the source generator so selected properties can be explicitly excluded from binding.
Changes:
  • Introduces ConfigurationIgnoreAttribute in Microsoft.Extensions.Configuration.Abstractions (impl + ref surface).
  • Updates reflection binder and source generator to skip ignored properties during binding and constructor-parameter matching.
  • Adds/extends tests and updates package documentation examples to cover ignore behavior and ErrorOnUnknownConfiguration.
Reviewed changes
Copilot reviewed 12 out of 12 changed files in this pull request and generated 5 comments.
Show a summary per file
FileDescription
src/libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.TestClasses.csAdds a primary-ctor test type with an ignored property to validate ctor/property matching behavior.
src/libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.Helpers.csExtends ComplexOptions with an ignored property for binder test coverage.
src/libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.csAdds tests asserting ignored properties aren’t bound and don’t trip ErrorOnUnknownConfiguration, plus ctor-matching behavior.
src/libraries/Microsoft.Extensions.Configuration.Binder/src/ConfigurationBinder.csSkips ignored properties in reflection binding and in ctor-parameter/property equivalence checks; adds IsIgnoredProperty.
src/libraries/Microsoft.Extensions.Configuration.Binder/gen/Specs/TypeIndex.csEnsures generator considers property.IsIgnored when deciding if a property is bindable.
src/libraries/Microsoft.Extensions.Configuration.Binder/gen/Specs/Members/PropertySpec.csAdds IsIgnored flag to property spec model used by the generator.
src/libraries/Microsoft.Extensions.Configuration.Binder/gen/Parser/KnownTypeSymbols.csAdds symbol lookup for ConfigurationIgnoreAttribute for generator parsing.
src/libraries/Microsoft.Extensions.Configuration.Binder/gen/ConfigurationBindingGenerator.Parser.csParses [ConfigurationIgnore] and attempts to incorporate it into property/ctor matching.
src/libraries/Microsoft.Extensions.Configuration.Abstractions/src/PACKAGE.mdUpdates package example to mention/use [ConfigurationIgnore].
src/libraries/Microsoft.Extensions.Configuration.Abstractions/src/ConfigurationIgnoreAttribute.csAdds the new public attribute type.
src/libraries/Microsoft.Extensions.Configuration.Abstractions/ref/Microsoft.Extensions.Configuration.Abstractions.csAdds the attribute to the reference assembly surface area.
src/libraries/Microsoft.Extensions.Configuration.Abstractions/README.mdUpdates README example to mention/use [ConfigurationIgnore].
Comment threadsrc/libraries/Microsoft.Extensions.Configuration.Abstractions/src/PACKAGE.md
Comment threadsrc/libraries/Microsoft.Extensions.Configuration.Abstractions/README.md
Comment thread...raries/Microsoft.Extensions.Configuration.Binder/gen/ConfigurationBindingGenerator.Parser.cs
Comment thread...libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.cs
Comment thread...libraries/Microsoft.Extensions.Configuration.Binder/tests/Common/ConfigurationBinderTests.cs

This was referenced Apr 1, 2026

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Comment threadsrc/libraries/Microsoft.Extensions.Configuration.Binder/src/ConfigurationBinder.cs
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Add COnfigurationIgnoreAttributeAdd ConfigurationIgnoreAttributeApr 2, 2026
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Pull request overview
Copilot reviewed 12 out of 12 changed files in this pull request and generated 1 comment.
Comments suppressed due to low confidence (1)
src/libraries/Microsoft.Extensions.Configuration.Binder/src/ConfigurationBinder.cs:256
  • The constructor-parameter/property check is case-sensitive (p.Name == property.Name), but constructor parameter ↔ property equivalence is treated case-insensitively elsewhere (e.g., DoAllParametersHaveEquivalentProperties uses OrdinalIgnoreCase). This can cause properties whose names differ only by casing (common with primary ctors like "color" → "Color") to be bound again instead of going through the ctor-parameter path. Consider using an OrdinalIgnoreCase comparison here for consistency and to avoid unintended extra binding/setter side-effects.

if (constructorParameters is null || !constructorParameters.Any(p => p.Name == property.Name))
{
BindProperty(property, instance, configuration, options);
}

Comment threadsrc/libraries/Microsoft.Extensions.Configuration.Abstractions/README.md
@rosebyte
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feature/configuration-ignore-attribute
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Pull request overview
Copilot reviewed 12 out of 12 changed files in this pull request and generated no new comments.
CopilotAI
review requested due to automatic review settings
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@rosebyte
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Pull request overview
Copilot reviewed 12 out of 12 changed files in this pull request and generated no new comments.
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Thanks!

This was referenced Apr 9, 2026

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Pull request overview
Copilot reviewed 12 out of 12 changed files in this pull request and generated no new comments.
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@rosebyte
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dotnet:mainApr 14, 2026

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Copilot left review comments
@cincuranetcincuranetcincuranet approved these changes
@tarekghtarekghtarekgh approved these changes
@svicksvickAwaiting requested review from svick
@mrek-msftmrek-msftAwaiting requested review from mrek-msft

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@rosebyterosebyte

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area-Extensions-Configuration

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11.0.0

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Successfully merging this pull request may close these issues.

[API Proposal]: Add ConfigurationIgnoreAttribute to exclude properties from configuration binding


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@rosebyte@cincuranet@tarekgh