[release/11.0-preview3] Enable runtime-async in CoreCLR System.Private.CoreLib - #126674

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[release/11.0-preview3] Enable runtime-async in CoreCLR System.Private.CoreLib#126674
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Backport of #126594 to release/11.0-preview3

/cc @agocke@copilot

Customer Impact

  • Customer reported
  • Found internally

[Select one or both of the boxes. Describe how this issue impacts customers, citing the expected and actual behaviors and scope of the issue. If customer-reported, provide the issue number.]

Regression

  • Yes
  • No

[If yes, specify when the regression was introduced. Provide the PR or commit if known.]

Testing

[How was the fix verified? How was the issue missed previously? What tests were added?]

Risk

[High/Medium/Low. Justify the indication by mentioning how risks were measured and addressed.]

IMPORTANT: If this backport is for a servicing release, please verify that:

  • For .NET 8 and .NET 9: The PR target branch is release/X.0-staging, not release/X.0.
  • For .NET 10+: The PR target branch is release/X.0 (no -staging suffix).

Package authoring no longer needed in .NET 9

IMPORTANT: Starting with .NET 9, you no longer need to edit a NuGet package's csproj to enable building and bump the version.
Keep in mind that we still need package authoring in .NET 8 and older versions.

CopilotAIand others added 3 commits April 9, 2026 00:03
@agocke
Enable runtime-async for CoreCLR System.Private.CoreLib, excluding ri…
c5d6a78
…scv64, loongarch64, and Mono
Agent-Logs-Url: https://github.com/dotnet/runtime/sessions/46f839bd-54df-446d-8b31-41b32d813c8c
Co-authored-by: agocke <515774+agocke@users.noreply.github.com>
@agocke@MichalStrehovsky
Update src/coreclr/System.Private.CoreLib/System.Private.CoreLib.csproj
5883ba2
Co-authored-by: Michal Strehovský <MichalStrehovsky@users.noreply.github.com>
@agocke@am11
Update src/coreclr/System.Private.CoreLib/System.Private.CoreLib.csproj
914a793
Co-authored-by: Adeel Mujahid <3840695+am11@users.noreply.github.com>
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agocke commented Apr 9, 2026

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Unfortunately this won't make preview 3. It looks like there are bootstrapping issues with R2R, and we don't have time to complete this before preview 3 ships. We'll just have to bring this in for p4.

@agockeagocke closed this Apr 9, 2026
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@jkotas
jkotas deleted the backport/pr-126594-to-release/11.0-preview3 branch May 22, 2026 15:56
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, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} 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
[release/11.0-preview3] Enable runtime-async in CoreCLR System.Private.CoreLib - #126674
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[release/11.0-preview3] Enable runtime-async in CoreCLR System.Private.CoreLib#126674
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Backport of #126594 to release/11.0-preview3
/cc @agocke@copilot
Customer Impact
  •  Customer reported
  •  Found internally
[Select one or both of the boxes. Describe how this issue impacts customers, citing the expected and actual behaviors and scope of the issue. If customer-reported, provide the issue number.]
Regression
  •  Yes
  •  No
[If yes, specify when the regression was introduced. Provide the PR or commit if known.]
Testing
[How was the fix verified? How was the issue missed previously? What tests were added?]
Risk
[High/Medium/Low. Justify the indication by mentioning how risks were measured and addressed.]
IMPORTANT: If this backport is for a servicing release, please verify that:
  • For .NET 8 and .NET 9: The PR target branch is release/X.0-staging, not release/X.0.
  • For .NET 10+: The PR target branch is release/X.0 (no -staging suffix).
Package authoring no longer needed in .NET 9
IMPORTANT: Starting with .NET 9, you no longer need to edit a NuGet package's csproj to enable building and bump the version.

Keep in mind that we still need package authoring in .NET 8 and older versions.
CopilotAIand others
added 3 commits
April 9, 2026 00:03
@agocke
Enable runtime-async for CoreCLR System.Private.CoreLib, excluding ri…
c5d6a78
…scv64, loongarch64, and Mono
Agent-Logs-Url: https://github.com/dotnet/runtime/sessions/46f839bd-54df-446d-8b31-41b32d813c8c
Co-authored-by: agocke <515774+agocke@users.noreply.github.com>
@agocke@MichalStrehovsky
Update src/coreclr/System.Private.CoreLib/System.Private.CoreLib.csproj
5883ba2
Co-authored-by: Michal Strehovský <MichalStrehovsky@users.noreply.github.com>
@agocke@am11
Update src/coreclr/System.Private.CoreLib/System.Private.CoreLib.csproj
914a793
Co-authored-by: Adeel Mujahid <3840695+am11@users.noreply.github.com>
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Unfortunately this won't make preview 3. It looks like there are bootstrapping issues with R2R, and we don't have time to complete this before preview 3 ships. We'll just have to bring this in for p4.
@agockeagocke
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Apr 9, 2026
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@jkotas
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, '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
[release/11.0-preview3] Enable runtime-async in CoreCLR System.Private.CoreLib - #126674
Closed
github-actions[bot] wants to merge 3 commits into
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backport/pr-126594-to-release/11.0-preview3
Closed
[release/11.0-preview3] Enable runtime-async in CoreCLR System.Private.CoreLib#126674
github-actions[bot] wants to merge 3 commits into
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Backport of #126594 to release/11.0-preview3
/cc @agocke@copilot
Customer Impact
  •  Customer reported
  •  Found internally
[Select one or both of the boxes. Describe how this issue impacts customers, citing the expected and actual behaviors and scope of the issue. If customer-reported, provide the issue number.]
Regression
  •  Yes
  •  No
[If yes, specify when the regression was introduced. Provide the PR or commit if known.]
Testing
[How was the fix verified? How was the issue missed previously? What tests were added?]
Risk
[High/Medium/Low. Justify the indication by mentioning how risks were measured and addressed.]
IMPORTANT: If this backport is for a servicing release, please verify that:
  • For .NET 8 and .NET 9: The PR target branch is release/X.0-staging, not release/X.0.
  • For .NET 10+: The PR target branch is release/X.0 (no -staging suffix).
Package authoring no longer needed in .NET 9
IMPORTANT: Starting with .NET 9, you no longer need to edit a NuGet package's csproj to enable building and bump the version.

Keep in mind that we still need package authoring in .NET 8 and older versions.
CopilotAIand others
added 3 commits
April 9, 2026 00:03
@agocke
Enable runtime-async for CoreCLR System.Private.CoreLib, excluding ri…
c5d6a78
…scv64, loongarch64, and Mono
Agent-Logs-Url: https://github.com/dotnet/runtime/sessions/46f839bd-54df-446d-8b31-41b32d813c8c
Co-authored-by: agocke <515774+agocke@users.noreply.github.com>
@agocke@MichalStrehovsky
Update src/coreclr/System.Private.CoreLib/System.Private.CoreLib.csproj
5883ba2
Co-authored-by: Michal Strehovský <MichalStrehovsky@users.noreply.github.com>
@agocke@am11
Update src/coreclr/System.Private.CoreLib/System.Private.CoreLib.csproj
914a793
Co-authored-by: Adeel Mujahid <3840695+am11@users.noreply.github.com>
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agocke
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Unfortunately this won't make preview 3. It looks like there are bootstrapping issues with R2R, and we don't have time to complete this before preview 3 ships. We'll just have to bring this in for p4.
@agockeagocke
closed this
Apr 9, 2026
@github-actionsgithub-actionsBot
locked and limited conversation to collaborators
May 10, 2026
@jkotas
jkotas
deleted the

backport/pr-126594-to-release/11.0-preview3

branch
May 22, 2026 15:56
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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
[release/11.0-preview3] Enable runtime-async in CoreCLR System.Private.CoreLib - #126674
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release/11.0-preview3from 
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[release/11.0-preview3] Enable runtime-async in CoreCLR System.Private.CoreLib#126674
github-actions[bot] wants to merge 3 commits into
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Backport of #126594 to release/11.0-preview3
/cc @agocke@copilot
Customer Impact
  •  Customer reported
  •  Found internally
[Select one or both of the boxes. Describe how this issue impacts customers, citing the expected and actual behaviors and scope of the issue. If customer-reported, provide the issue number.]
Regression
  •  Yes
  •  No
[If yes, specify when the regression was introduced. Provide the PR or commit if known.]
Testing
[How was the fix verified? How was the issue missed previously? What tests were added?]
Risk
[High/Medium/Low. Justify the indication by mentioning how risks were measured and addressed.]
IMPORTANT: If this backport is for a servicing release, please verify that:
  • For .NET 8 and .NET 9: The PR target branch is release/X.0-staging, not release/X.0.
  • For .NET 10+: The PR target branch is release/X.0 (no -staging suffix).
Package authoring no longer needed in .NET 9
IMPORTANT: Starting with .NET 9, you no longer need to edit a NuGet package's csproj to enable building and bump the version.

Keep in mind that we still need package authoring in .NET 8 and older versions.
CopilotAIand others
added 3 commits
April 9, 2026 00:03
@agocke
Enable runtime-async for CoreCLR System.Private.CoreLib, excluding ri…
c5d6a78
…scv64, loongarch64, and Mono
Agent-Logs-Url: https://github.com/dotnet/runtime/sessions/46f839bd-54df-446d-8b31-41b32d813c8c
Co-authored-by: agocke <515774+agocke@users.noreply.github.com>
@agocke@MichalStrehovsky
Update src/coreclr/System.Private.CoreLib/System.Private.CoreLib.csproj
5883ba2
Co-authored-by: Michal Strehovský <MichalStrehovsky@users.noreply.github.com>
@agocke@am11
Update src/coreclr/System.Private.CoreLib/System.Private.CoreLib.csproj
914a793
Co-authored-by: Adeel Mujahid <3840695+am11@users.noreply.github.com>
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Apr 9, 2026

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Unfortunately this won't make preview 3. It looks like there are bootstrapping issues with R2R, and we don't have time to complete this before preview 3 ships. We'll just have to bring this in for p4.
@agockeagocke
closed this
Apr 9, 2026
@github-actionsgithub-actionsBot
locked and limited conversation to collaborators
May 10, 2026
@jkotas
jkotas
deleted the

backport/pr-126594-to-release/11.0-preview3

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May 22, 2026 15:56
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, '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
[release/11.0-preview3] Enable runtime-async in CoreCLR System.Private.CoreLib - #126674
Closed
github-actions[bot] wants to merge 3 commits into
release/11.0-preview3from 
backport/pr-126594-to-release/11.0-preview3
Closed
[release/11.0-preview3] Enable runtime-async in CoreCLR System.Private.CoreLib#126674
github-actions[bot] wants to merge 3 commits into
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Backport of #126594 to release/11.0-preview3
/cc @agocke@copilot
Customer Impact
  •  Customer reported
  •  Found internally
[Select one or both of the boxes. Describe how this issue impacts customers, citing the expected and actual behaviors and scope of the issue. If customer-reported, provide the issue number.]
Regression
  •  Yes
  •  No
[If yes, specify when the regression was introduced. Provide the PR or commit if known.]
Testing
[How was the fix verified? How was the issue missed previously? What tests were added?]
Risk
[High/Medium/Low. Justify the indication by mentioning how risks were measured and addressed.]
IMPORTANT: If this backport is for a servicing release, please verify that:
  • For .NET 8 and .NET 9: The PR target branch is release/X.0-staging, not release/X.0.
  • For .NET 10+: The PR target branch is release/X.0 (no -staging suffix).
Package authoring no longer needed in .NET 9
IMPORTANT: Starting with .NET 9, you no longer need to edit a NuGet package's csproj to enable building and bump the version.

Keep in mind that we still need package authoring in .NET 8 and older versions.
CopilotAIand others
added 3 commits
April 9, 2026 00:03
@agocke
Enable runtime-async for CoreCLR System.Private.CoreLib, excluding ri…
c5d6a78
…scv64, loongarch64, and Mono
Agent-Logs-Url: https://github.com/dotnet/runtime/sessions/46f839bd-54df-446d-8b31-41b32d813c8c
Co-authored-by: agocke <515774+agocke@users.noreply.github.com>
@agocke@MichalStrehovsky
Update src/coreclr/System.Private.CoreLib/System.Private.CoreLib.csproj
5883ba2
Co-authored-by: Michal Strehovský <MichalStrehovsky@users.noreply.github.com>
@agocke@am11
Update src/coreclr/System.Private.CoreLib/System.Private.CoreLib.csproj
914a793
Co-authored-by: Adeel Mujahid <3840695+am11@users.noreply.github.com>
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Apr 9, 2026

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Unfortunately this won't make preview 3. It looks like there are bootstrapping issues with R2R, and we don't have time to complete this before preview 3 ships. We'll just have to bring this in for p4.
@agockeagocke
closed this
Apr 9, 2026
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locked and limited conversation to collaborators
May 10, 2026
@jkotas
jkotas
deleted the

backport/pr-126594-to-release/11.0-preview3

branch
May 22, 2026 15:56
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, '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
[release/11.0-preview3] Enable runtime-async in CoreCLR System.Private.CoreLib - #126674
Closed
github-actions[bot] wants to merge 3 commits into
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backport/pr-126594-to-release/11.0-preview3
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[release/11.0-preview3] Enable runtime-async in CoreCLR System.Private.CoreLib#126674
github-actions[bot] wants to merge 3 commits into
release/11.0-preview3from 
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Backport of #126594 to release/11.0-preview3
/cc @agocke@copilot
Customer Impact
  •  Customer reported
  •  Found internally
[Select one or both of the boxes. Describe how this issue impacts customers, citing the expected and actual behaviors and scope of the issue. If customer-reported, provide the issue number.]
Regression
  •  Yes
  •  No
[If yes, specify when the regression was introduced. Provide the PR or commit if known.]
Testing
[How was the fix verified? How was the issue missed previously? What tests were added?]
Risk
[High/Medium/Low. Justify the indication by mentioning how risks were measured and addressed.]
IMPORTANT: If this backport is for a servicing release, please verify that:
  • For .NET 8 and .NET 9: The PR target branch is release/X.0-staging, not release/X.0.
  • For .NET 10+: The PR target branch is release/X.0 (no -staging suffix).
Package authoring no longer needed in .NET 9
IMPORTANT: Starting with .NET 9, you no longer need to edit a NuGet package's csproj to enable building and bump the version.

Keep in mind that we still need package authoring in .NET 8 and older versions.
CopilotAIand others
added 3 commits
April 9, 2026 00:03
@agocke
Enable runtime-async for CoreCLR System.Private.CoreLib, excluding ri…
c5d6a78
…scv64, loongarch64, and Mono
Agent-Logs-Url: https://github.com/dotnet/runtime/sessions/46f839bd-54df-446d-8b31-41b32d813c8c
Co-authored-by: agocke <515774+agocke@users.noreply.github.com>
@agocke@MichalStrehovsky
Update src/coreclr/System.Private.CoreLib/System.Private.CoreLib.csproj
5883ba2
Co-authored-by: Michal Strehovský <MichalStrehovsky@users.noreply.github.com>
@agocke@am11
Update src/coreclr/System.Private.CoreLib/System.Private.CoreLib.csproj
914a793
Co-authored-by: Adeel Mujahid <3840695+am11@users.noreply.github.com>
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Tagging subscribers to this area: @agocke

See info in area-owners.md if you want to be subscribed.

This was referenced Apr 9, 2026

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@agocke
agocke
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Apr 9, 2026

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Unfortunately this won't make preview 3. It looks like there are bootstrapping issues with R2R, and we don't have time to complete this before preview 3 ships. We'll just have to bring this in for p4.
@agockeagocke
closed this
Apr 9, 2026
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locked and limited conversation to collaborators
May 10, 2026
@jkotas
jkotas
deleted the

backport/pr-126594-to-release/11.0-preview3

branch
May 22, 2026 15:56
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, '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
[release/11.0-preview3] Enable runtime-async in CoreCLR System.Private.CoreLib - #126674
Closed
github-actions[bot] wants to merge 3 commits into
release/11.0-preview3from 
backport/pr-126594-to-release/11.0-preview3
Closed
[release/11.0-preview3] Enable runtime-async in CoreCLR System.Private.CoreLib#126674
github-actions[bot] wants to merge 3 commits into
release/11.0-preview3from 
backport/pr-126594-to-release/11.0-preview3
Conversation
@github-actions
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Apr 9, 2026

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Backport of #126594 to release/11.0-preview3
/cc @agocke@copilot
Customer Impact
  •  Customer reported
  •  Found internally
[Select one or both of the boxes. Describe how this issue impacts customers, citing the expected and actual behaviors and scope of the issue. If customer-reported, provide the issue number.]
Regression
  •  Yes
  •  No
[If yes, specify when the regression was introduced. Provide the PR or commit if known.]
Testing
[How was the fix verified? How was the issue missed previously? What tests were added?]
Risk
[High/Medium/Low. Justify the indication by mentioning how risks were measured and addressed.]
IMPORTANT: If this backport is for a servicing release, please verify that:
  • For .NET 8 and .NET 9: The PR target branch is release/X.0-staging, not release/X.0.
  • For .NET 10+: The PR target branch is release/X.0 (no -staging suffix).
Package authoring no longer needed in .NET 9
IMPORTANT: Starting with .NET 9, you no longer need to edit a NuGet package's csproj to enable building and bump the version.

Keep in mind that we still need package authoring in .NET 8 and older versions.
CopilotAIand others
added 3 commits
April 9, 2026 00:03
@agocke
Enable runtime-async for CoreCLR System.Private.CoreLib, excluding ri…
c5d6a78
…scv64, loongarch64, and Mono
Agent-Logs-Url: https://github.com/dotnet/runtime/sessions/46f839bd-54df-446d-8b31-41b32d813c8c
Co-authored-by: agocke <515774+agocke@users.noreply.github.com>
@agocke@MichalStrehovsky
Update src/coreclr/System.Private.CoreLib/System.Private.CoreLib.csproj
5883ba2
Co-authored-by: Michal Strehovský <MichalStrehovsky@users.noreply.github.com>
@agocke@am11
Update src/coreclr/System.Private.CoreLib/System.Private.CoreLib.csproj
914a793
Co-authored-by: Adeel Mujahid <3840695+am11@users.noreply.github.com>
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Apr 9, 2026

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Tagging subscribers to this area: @agocke

See info in area-owners.md if you want to be subscribed.

This was referenced Apr 9, 2026

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Closed

@agocke
agocke
commented
Apr 9, 2026

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Unfortunately this won't make preview 3. It looks like there are bootstrapping issues with R2R, and we don't have time to complete this before preview 3 ships. We'll just have to bring this in for p4.
@agockeagocke
closed this
Apr 9, 2026
@github-actionsgithub-actionsBot
locked and limited conversation to collaborators
May 10, 2026
@jkotas
jkotas
deleted the

backport/pr-126594-to-release/11.0-preview3

branch
May 22, 2026 15:56
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@agocke

, '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
[release/11.0-preview3] Enable runtime-async in CoreCLR System.Private.CoreLib - #126674
Closed
github-actions[bot] wants to merge 3 commits into
release/11.0-preview3from 
backport/pr-126594-to-release/11.0-preview3
Closed
[release/11.0-preview3] Enable runtime-async in CoreCLR System.Private.CoreLib#126674
github-actions[bot] wants to merge 3 commits into
release/11.0-preview3from 
backport/pr-126594-to-release/11.0-preview3
Conversation
@github-actions
@github-actionsgithub-actionsBot
commented
Apr 9, 2026

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Backport of #126594 to release/11.0-preview3
/cc @agocke@copilot
Customer Impact
  •  Customer reported
  •  Found internally
[Select one or both of the boxes. Describe how this issue impacts customers, citing the expected and actual behaviors and scope of the issue. If customer-reported, provide the issue number.]
Regression
  •  Yes
  •  No
[If yes, specify when the regression was introduced. Provide the PR or commit if known.]
Testing
[How was the fix verified? How was the issue missed previously? What tests were added?]
Risk
[High/Medium/Low. Justify the indication by mentioning how risks were measured and addressed.]
IMPORTANT: If this backport is for a servicing release, please verify that:
  • For .NET 8 and .NET 9: The PR target branch is release/X.0-staging, not release/X.0.
  • For .NET 10+: The PR target branch is release/X.0 (no -staging suffix).
Package authoring no longer needed in .NET 9
IMPORTANT: Starting with .NET 9, you no longer need to edit a NuGet package's csproj to enable building and bump the version.

Keep in mind that we still need package authoring in .NET 8 and older versions.
CopilotAIand others
added 3 commits
April 9, 2026 00:03
@agocke
Enable runtime-async for CoreCLR System.Private.CoreLib, excluding ri…
c5d6a78
…scv64, loongarch64, and Mono
Agent-Logs-Url: https://github.com/dotnet/runtime/sessions/46f839bd-54df-446d-8b31-41b32d813c8c
Co-authored-by: agocke <515774+agocke@users.noreply.github.com>
@agocke@MichalStrehovsky
Update src/coreclr/System.Private.CoreLib/System.Private.CoreLib.csproj
5883ba2
Co-authored-by: Michal Strehovský <MichalStrehovsky@users.noreply.github.com>
@agocke@am11
Update src/coreclr/System.Private.CoreLib/System.Private.CoreLib.csproj
914a793
Co-authored-by: Adeel Mujahid <3840695+am11@users.noreply.github.com>
@dotnet-policy-service
dotnet-policy-serviceBot
commented
Apr 9, 2026

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Tagging subscribers to this area: @agocke

See info in area-owners.md if you want to be subscribed.

This was referenced Apr 9, 2026

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@agocke
agocke
commented
Apr 9, 2026

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Unfortunately this won't make preview 3. It looks like there are bootstrapping issues with R2R, and we don't have time to complete this before preview 3 ships. We'll just have to bring this in for p4.
@agockeagocke
closed this
Apr 9, 2026
@github-actionsgithub-actionsBot
locked and limited conversation to collaborators
May 10, 2026
@jkotas
jkotas
deleted the

backport/pr-126594-to-release/11.0-preview3

branch
May 22, 2026 15:56
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2 participants

@agocke