From 8f6c48fcf0333b684cda3ae185d65ee39317a738 Mon Sep 17 00:00:00 2001
From: hrrrrustic <hrrrrustic@gmail.com>
Date: Mon, 12 Apr 2021 13:36:43 +0300
Subject: [PATCH] readonly annotation

---
 .../ServiceModel/Syndication/ExtensibleSyndicationObject.cs | 6 +++---
 .../src/System/ServiceModel/Syndication/XmlDateTimeData.cs  | 4 ++--
 .../src/System/ServiceModel/Syndication/XmlUriData.cs       | 6 +++---
 .../src/System/ServiceModel/XmlBuffer.cs                    | 6 +++---
 4 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/src/libraries/System.ServiceModel.Syndication/src/System/ServiceModel/Syndication/ExtensibleSyndicationObject.cs b/src/libraries/System.ServiceModel.Syndication/src/System/ServiceModel/Syndication/ExtensibleSyndicationObject.cs
index 318b0014f45f5b..a397a3bd78f710 100644
--- a/src/libraries/System.ServiceModel.Syndication/src/System/ServiceModel/Syndication/ExtensibleSyndicationObject.cs
+++ b/src/libraries/System.ServiceModel.Syndication/src/System/ServiceModel/Syndication/ExtensibleSyndicationObject.cs
@@ -84,7 +84,7 @@ internal void LoadElementExtensions(XmlBuffer buffer)
             _elementExtensions = new SyndicationElementExtensionCollection(buffer);
         }
 
-        internal void WriteAttributeExtensions(XmlWriter writer)
+        internal readonly void WriteAttributeExtensions(XmlWriter writer)
         {
             if (writer == null)
             {
@@ -101,7 +101,7 @@ internal void WriteAttributeExtensions(XmlWriter writer)
             }
         }
 
-        internal void WriteElementExtensions(XmlWriter writer, Func<string, string, bool> shouldSkipElement = null)
+        internal readonly void WriteElementExtensions(XmlWriter writer, Func<string, string, bool> shouldSkipElement = null)
         {
             if (writer == null)
             {
@@ -114,6 +114,6 @@ internal void WriteElementExtensions(XmlWriter writer, Func<string, string, bool
             }
         }
 
-        public ExtensibleSyndicationObject Clone() => new ExtensibleSyndicationObject(this);
+        public readonly ExtensibleSyndicationObject Clone() => new ExtensibleSyndicationObject(this);
     }
 }
diff --git a/src/libraries/System.ServiceModel.Syndication/src/System/ServiceModel/Syndication/XmlDateTimeData.cs b/src/libraries/System.ServiceModel.Syndication/src/System/ServiceModel/Syndication/XmlDateTimeData.cs
index 689bf0e88315bb..e9dad6a68fb0b2 100644
--- a/src/libraries/System.ServiceModel.Syndication/src/System/ServiceModel/Syndication/XmlDateTimeData.cs
+++ b/src/libraries/System.ServiceModel.Syndication/src/System/ServiceModel/Syndication/XmlDateTimeData.cs
@@ -13,8 +13,8 @@ public XmlDateTimeData(string dateTimeString, XmlQualifiedName elementQualifiedN
             ElementQualifiedName = elementQualifiedName;
         }
 
-        public string DateTimeString { get; }
+        public readonly string DateTimeString { get; }
 
-        public XmlQualifiedName ElementQualifiedName { get; }
+        public readonly XmlQualifiedName ElementQualifiedName { get; }
     }
 }
diff --git a/src/libraries/System.ServiceModel.Syndication/src/System/ServiceModel/Syndication/XmlUriData.cs b/src/libraries/System.ServiceModel.Syndication/src/System/ServiceModel/Syndication/XmlUriData.cs
index 274045403abd9b..a1ceb27f6f4c96 100644
--- a/src/libraries/System.ServiceModel.Syndication/src/System/ServiceModel/Syndication/XmlUriData.cs
+++ b/src/libraries/System.ServiceModel.Syndication/src/System/ServiceModel/Syndication/XmlUriData.cs
@@ -14,10 +14,10 @@ public XmlUriData(string uriString, UriKind uriKind, XmlQualifiedName elementQua
             ElementQualifiedName = elementQualifiedName;
         }
 
-        public XmlQualifiedName ElementQualifiedName { get; }
+        public readonly XmlQualifiedName ElementQualifiedName { get; }
 
-        public UriKind UriKind { get; }
+        public readonly UriKind UriKind { get; }
 
-        public string UriString { get; }
+        public readonly string UriString { get; }
     }
 }
diff --git a/src/libraries/System.ServiceModel.Syndication/src/System/ServiceModel/XmlBuffer.cs b/src/libraries/System.ServiceModel.Syndication/src/System/ServiceModel/XmlBuffer.cs
index 08f68ba039acab..6d1326b927af48 100644
--- a/src/libraries/System.ServiceModel.Syndication/src/System/ServiceModel/XmlBuffer.cs
+++ b/src/libraries/System.ServiceModel.Syndication/src/System/ServiceModel/XmlBuffer.cs
@@ -33,11 +33,11 @@ public Section(int offset, int size, XmlDictionaryReaderQuotas quotas)
                 Quotas = quotas;
             }
 
-            public int Offset { get; }
+            public readonly int Offset { get; }
 
-            public int Size { get; }
+            public readonly int Size { get; }
 
-            public XmlDictionaryReaderQuotas Quotas { get; }
+            public readonly XmlDictionaryReaderQuotas Quotas { get; }
         }
 
         public XmlBuffer(int maxBufferSize)