dotnet · dotnet-policy-service · May 29, 2025 · May 28, 2025
diff --git a/xml/Microsoft.Extensions.Caching.Hybrid/HybridCache.xml b/xml/Microsoft.Extensions.Caching.Hybrid/HybridCache.xml
@@ -181,8 +181,8 @@
         <typeparam name="TState">The type of additional state required by <paramref name="factory" />.</typeparam>
         <typeparam name="T">The type of the data being considered.</typeparam>
         <param name="key">The key of the entry to look for or create.</param>
-        <param name="factory">Provides the underlying data service if the data is not available in the cache.</param>
         <param name="state">The state required for <paramref name="factory" />.</param>
+        <param name="factory">Provides the underlying data service if the data is not available in the cache.</param>
         <param name="options">Additional options for this cache entry.</param>
         <param name="tags">The tags to associate with this cache item.</param>
         <param name="cancellationToken">The <see cref="T:System.Threading.CancellationToken" /> used to propagate notifications that the operation should be canceled.</param>

diff --git a/...osoft.Extensions.DependencyInjection.Extensions/ServiceCollectionDescriptorExtensions.xml b/...osoft.Extensions.DependencyInjection.Extensions/ServiceCollectionDescriptorExtensions.xml
@@ -649,8 +649,8 @@
       <Docs>
         <typeparam name="TService">The type of the service to add.</typeparam>
         <param name="services">The <see cref="T:Microsoft.Extensions.DependencyInjection.IServiceCollection" />.</param>
-        <param name="implementationFactory">The factory that creates the service.</param>
         <param name="serviceKey">The service key.</param>
+        <param name="implementationFactory">The factory that creates the service.</param>
         <summary>
             Adds the specified <typeparamref name="TService" /> as a <see cref="F:Microsoft.Extensions.DependencyInjection.ServiceLifetime.Scoped" /> service
             using the factory specified in <paramref name="implementationFactory" />

diff --git a/xml/Microsoft.Extensions.Diagnostics.Metrics/MetricsBuilderExtensions.xml b/xml/Microsoft.Extensions.Diagnostics.Metrics/MetricsBuilderExtensions.xml
@@ -48,8 +48,8 @@
         <Parameter Name="listener" Type="Microsoft.Extensions.Diagnostics.Metrics.IMetricsListener" />
       </Parameters>
       <Docs>
-        <param name="listener">The implementation type of the listener.</param>
         <param name="builder">The <see cref="T:Microsoft.Extensions.Diagnostics.Metrics.IMetricsBuilder" />.</param>
+        <param name="listener">The implementation type of the listener.</param>
         <summary>
             Registers a new <see cref="T:Microsoft.Extensions.Diagnostics.Metrics.IMetricsListener" /> instance.
             </summary>

diff --git a/xml/System.Buffers/ReadOnlySpanAction`2.xml b/xml/System.Buffers/ReadOnlySpanAction`2.xml
@@ -1,10 +1,11 @@
 <Type Name="ReadOnlySpanAction&lt;T,TArg&gt;" FullName="System.Buffers.ReadOnlySpanAction&lt;T,TArg&gt;">
-  <TypeSignature Language="C#" Value="public delegate void ReadOnlySpanAction&lt;T,in TArg&gt;(ReadOnlySpan&lt;T&gt; span, TArg arg);" />
+  <TypeSignature Language="C#" Value="public delegate void ReadOnlySpanAction&lt;T,in TArg&gt;(ReadOnlySpan&lt;T&gt; span, TArg arg) where TArg : allows ref struct;" FrameworkAlternate="net-10.0;net-9.0" />
   <TypeSignature Language="ILAsm" Value=".class public auto ansi sealed ReadOnlySpanAction`2&lt;T, - TArg&gt; extends System.MulticastDelegate" />
   <TypeSignature Language="DocId" Value="T:System.Buffers.ReadOnlySpanAction`2" />
   <TypeSignature Language="VB.NET" Value="Public Delegate Sub ReadOnlySpanAction(Of T, In TArg)(span As ReadOnlySpan(Of T), arg As TArg)" />
   <TypeSignature Language="F#" Value="type ReadOnlySpanAction&lt;'T, 'Arg&gt; = delegate of ReadOnlySpan&lt;'T&gt; * 'Arg -&gt; unit" />
   <TypeSignature Language="C++ CLI" Value="generic &lt;typename T, typename TArg&gt;&#xA;public delegate void ReadOnlySpanAction(ReadOnlySpan&lt;T&gt; span, TArg arg);" />
+  <TypeSignature Language="C#" Value="public delegate void ReadOnlySpanAction&lt;T,in TArg&gt;(ReadOnlySpan&lt;T&gt; span, TArg arg);" FrameworkAlternate="net-5.0;net-6.0;net-7.0;net-8.0;netcore-2.1;netcore-2.2;netcore-3.0;netcore-3.1;netstandard-2.1" />
   <AssemblyInfo>
     <AssemblyName>System.Runtime</AssemblyName>
     <AssemblyVersion>4.2.1.0</AssemblyVersion>
@@ -46,6 +47,7 @@
       </Attributes>
       <Constraints>
         <ParameterAttribute>Contravariant</ParameterAttribute>
+        <ParameterAttribute>AllowByRefLike</ParameterAttribute>
       </Constraints>
     </TypeParameter>
   </TypeParameters>

diff --git a/xml/System.Buffers/SpanAction`2.xml b/xml/System.Buffers/SpanAction`2.xml
@@ -1,10 +1,11 @@
 <Type Name="SpanAction&lt;T,TArg&gt;" FullName="System.Buffers.SpanAction&lt;T,TArg&gt;">
-  <TypeSignature Language="C#" Value="public delegate void SpanAction&lt;T,in TArg&gt;(Span&lt;T&gt; span, TArg arg);" />
+  <TypeSignature Language="C#" Value="public delegate void SpanAction&lt;T,in TArg&gt;(Span&lt;T&gt; span, TArg arg) where TArg : allows ref struct;" FrameworkAlternate="net-10.0;net-9.0" />
   <TypeSignature Language="ILAsm" Value=".class public auto ansi sealed SpanAction`2&lt;T, - TArg&gt; extends System.MulticastDelegate" />
   <TypeSignature Language="DocId" Value="T:System.Buffers.SpanAction`2" />
   <TypeSignature Language="VB.NET" Value="Public Delegate Sub SpanAction(Of T, In TArg)(span As Span(Of T), arg As TArg)" />
   <TypeSignature Language="F#" Value="type SpanAction&lt;'T, 'Arg&gt; = delegate of Span&lt;'T&gt; * 'Arg -&gt; unit" />
   <TypeSignature Language="C++ CLI" Value="generic &lt;typename T, typename TArg&gt;&#xA;public delegate void SpanAction(Span&lt;T&gt; span, TArg arg);" />
+  <TypeSignature Language="C#" Value="public delegate void SpanAction&lt;T,in TArg&gt;(Span&lt;T&gt; span, TArg arg);" FrameworkAlternate="net-5.0;net-6.0;net-7.0;net-8.0;netcore-2.1;netcore-2.2;netcore-3.0;netcore-3.1;netstandard-2.1" />
   <AssemblyInfo>
     <AssemblyName>System.Runtime</AssemblyName>
     <AssemblyVersion>4.2.1.0</AssemblyVersion>
@@ -46,6 +47,7 @@
       </Attributes>
       <Constraints>
         <ParameterAttribute>Contravariant</ParameterAttribute>
+        <ParameterAttribute>AllowByRefLike</ParameterAttribute>
       </Constraints>
     </TypeParameter>
   </TypeParameters>

diff --git a/xml/System.Collections.Concurrent/ConcurrentDictionary`2+AlternateLookup`1.xml b/xml/System.Collections.Concurrent/ConcurrentDictionary`2+AlternateLookup`1.xml
@@ -1,5 +1,5 @@
 <Type Name="ConcurrentDictionary&lt;TKey,TValue&gt;+AlternateLookup&lt;TAlternateKey&gt;" FullName="System.Collections.Concurrent.ConcurrentDictionary&lt;TKey,TValue&gt;+AlternateLookup&lt;TAlternateKey&gt;">
-  <TypeSignature Language="C#" Value="public readonly struct ConcurrentDictionary&lt;TKey,TValue&gt;.AlternateLookup&lt;TAlternateKey&gt;" />
+  <TypeSignature Language="C#" Value="public readonly struct ConcurrentDictionary&lt;TKey,TValue&gt;.AlternateLookup&lt;TAlternateKey&gt; where TAlternateKey : allows ref struct" />
   <TypeSignature Language="ILAsm" Value=".class nested public sequential ansi sealed beforefieldinit ConcurrentDictionary`2/AlternateLookup`1&lt;TKey, TValue, TAlternateKey&gt; extends System.ValueType" />
   <TypeSignature Language="DocId" Value="T:System.Collections.Concurrent.ConcurrentDictionary`2.AlternateLookup`1" />
   <TypeSignature Language="VB.NET" Value="Public Structure ConcurrentDictionary(Of TKey, TValue).AlternateLookup(Of TAlternateKey)" />
@@ -24,7 +24,11 @@
         </Attribute>
       </Attributes>
     </TypeParameter>
-    <TypeParameter Name="TAlternateKey" Index="2" FrameworkAlternate="net-9.0" />
+    <TypeParameter Name="TAlternateKey" Index="2" FrameworkAlternate="net-9.0">
+      <Constraints>
+        <ParameterAttribute>AllowByRefLike</ParameterAttribute>
+      </Constraints>
+    </TypeParameter>
   </TypeParameters>
   <Base>
     <BaseTypeName>System.ValueType</BaseTypeName>

diff --git a/xml/System.Collections.Concurrent/ConcurrentDictionary`2.xml b/xml/System.Collections.Concurrent/ConcurrentDictionary`2.xml
@@ -704,12 +704,13 @@
       </Docs>
     </Member>
     <Member MemberName="AddOrUpdate&lt;TArg&gt;">
-      <MemberSignature Language="C#" Value="public TValue AddOrUpdate&lt;TArg&gt; (TKey key, Func&lt;TKey,TArg,TValue&gt; addValueFactory, Func&lt;TKey,TValue,TArg,TValue&gt; updateValueFactory, TArg factoryArgument);" />
+      <MemberSignature Language="C#" Value="public TValue AddOrUpdate&lt;TArg&gt; (TKey key, Func&lt;TKey,TArg,TValue&gt; addValueFactory, Func&lt;TKey,TValue,TArg,TValue&gt; updateValueFactory, TArg factoryArgument) where TArg : allows ref struct;" FrameworkAlternate="net-10.0;net-9.0" />
       <MemberSignature Language="ILAsm" Value=".method public hidebysig instance !TValue AddOrUpdate&lt;TArg&gt;(!TKey key, class System.Func`3&lt;!TKey, !!TArg, !TValue&gt; addValueFactory, class System.Func`4&lt;!TKey, !TValue, !!TArg, !TValue&gt; updateValueFactory, !!TArg factoryArgument) cil managed" />
       <MemberSignature Language="DocId" Value="M:System.Collections.Concurrent.ConcurrentDictionary`2.AddOrUpdate``1(`0,System.Func{`0,``0,`1},System.Func{`0,`1,``0,`1},``0)" />
       <MemberSignature Language="VB.NET" Value="Public Function AddOrUpdate(Of TArg) (key As TKey, addValueFactory As Func(Of TKey, TArg, TValue), updateValueFactory As Func(Of TKey, TValue, TArg, TValue), factoryArgument As TArg) As TValue" />
       <MemberSignature Language="F#" Value="member this.AddOrUpdate : 'Key * Func&lt;'Key, 'Arg, 'Value&gt; * Func&lt;'Key, 'Value, 'Arg, 'Value&gt; * 'Arg -&gt; 'Value" Usage="concurrentDictionary.AddOrUpdate (key, addValueFactory, updateValueFactory, factoryArgument)" />
       <MemberSignature Language="C++ CLI" Value="public:&#xA;generic &lt;typename TArg&gt;&#xA; TValue AddOrUpdate(TKey key, Func&lt;TKey, TArg, TValue&gt; ^ addValueFactory, Func&lt;TKey, TValue, TArg, TValue&gt; ^ updateValueFactory, TArg factoryArgument);" />
+      <MemberSignature Language="C#" Value="public TValue AddOrUpdate&lt;TArg&gt; (TKey key, Func&lt;TKey,TArg,TValue&gt; addValueFactory, Func&lt;TKey,TValue,TArg,TValue&gt; updateValueFactory, TArg factoryArgument);" FrameworkAlternate="net-5.0;net-6.0;net-7.0;net-8.0;netcore-2.0;netcore-2.1;netcore-2.2;netcore-3.0;netcore-3.1;netframework-4.7.2;netframework-4.8;netframework-4.8.1;netstandard-2.1" />
       <MemberType>Method</MemberType>
       <AssemblyInfo>
         <AssemblyName>System.Collections.Concurrent</AssemblyName>
@@ -741,6 +742,9 @@
               <AttributeName Language="F#">[&lt;System.Runtime.CompilerServices.Nullable(2)&gt;]</AttributeName>
             </Attribute>
           </Attributes>
+          <Constraints>
+            <ParameterAttribute>AllowByRefLike</ParameterAttribute>
+          </Constraints>
         </TypeParameter>
       </TypeParameters>
       <Parameters>
@@ -969,7 +973,7 @@
       </Docs>
     </Member>
     <Member MemberName="GetAlternateLookup&lt;TAlternateKey&gt;">
-      <MemberSignature Language="C#" Value="public System.Collections.Concurrent.ConcurrentDictionary&lt;TKey,TValue&gt;.AlternateLookup&lt;TAlternateKey&gt; GetAlternateLookup&lt;TAlternateKey&gt; ();" />
+      <MemberSignature Language="C#" Value="public System.Collections.Concurrent.ConcurrentDictionary&lt;TKey,TValue&gt;.AlternateLookup&lt;TAlternateKey&gt; GetAlternateLookup&lt;TAlternateKey&gt; () where TAlternateKey : allows ref struct;" />
       <MemberSignature Language="ILAsm" Value=".method public hidebysig instance valuetype System.Collections.Concurrent.ConcurrentDictionary`2/AlternateLookup`1&lt;!TKey, !TValue, !!TAlternateKey&gt; GetAlternateLookup&lt;TAlternateKey&gt;() cil managed" />
       <MemberSignature Language="DocId" Value="M:System.Collections.Concurrent.ConcurrentDictionary`2.GetAlternateLookup``1" />
       <MemberSignature Language="VB.NET" Value="Public Function GetAlternateLookup(Of TAlternateKey) () As ConcurrentDictionary(Of TKey, TValue).AlternateLookup(Of TAlternateKey)" />
@@ -997,7 +1001,11 @@
         </Attributes>
       </ReturnValue>
       <TypeParameters>
-        <TypeParameter Name="TAlternateKey" />
+        <TypeParameter Name="TAlternateKey">
+          <Constraints>
+            <ParameterAttribute>AllowByRefLike</ParameterAttribute>
+          </Constraints>
+        </TypeParameter>
       </TypeParameters>
       <Parameters />
       <Docs>
@@ -1227,12 +1235,13 @@
       </Docs>
     </Member>
     <Member MemberName="GetOrAdd&lt;TArg&gt;">
-      <MemberSignature Language="C#" Value="public TValue GetOrAdd&lt;TArg&gt; (TKey key, Func&lt;TKey,TArg,TValue&gt; valueFactory, TArg factoryArgument);" />
+      <MemberSignature Language="C#" Value="public TValue GetOrAdd&lt;TArg&gt; (TKey key, Func&lt;TKey,TArg,TValue&gt; valueFactory, TArg factoryArgument) where TArg : allows ref struct;" FrameworkAlternate="net-10.0;net-9.0" />
       <MemberSignature Language="ILAsm" Value=".method public hidebysig instance !TValue GetOrAdd&lt;TArg&gt;(!TKey key, class System.Func`3&lt;!TKey, !!TArg, !TValue&gt; valueFactory, !!TArg factoryArgument) cil managed" />
       <MemberSignature Language="DocId" Value="M:System.Collections.Concurrent.ConcurrentDictionary`2.GetOrAdd``1(`0,System.Func{`0,``0,`1},``0)" />
       <MemberSignature Language="VB.NET" Value="Public Function GetOrAdd(Of TArg) (key As TKey, valueFactory As Func(Of TKey, TArg, TValue), factoryArgument As TArg) As TValue" />
       <MemberSignature Language="F#" Value="member this.GetOrAdd : 'Key * Func&lt;'Key, 'Arg, 'Value&gt; * 'Arg -&gt; 'Value" Usage="concurrentDictionary.GetOrAdd (key, valueFactory, factoryArgument)" />
       <MemberSignature Language="C++ CLI" Value="public:&#xA;generic &lt;typename TArg&gt;&#xA; TValue GetOrAdd(TKey key, Func&lt;TKey, TArg, TValue&gt; ^ valueFactory, TArg factoryArgument);" />
+      <MemberSignature Language="C#" Value="public TValue GetOrAdd&lt;TArg&gt; (TKey key, Func&lt;TKey,TArg,TValue&gt; valueFactory, TArg factoryArgument);" FrameworkAlternate="net-5.0;net-6.0;net-7.0;net-8.0;netcore-2.0;netcore-2.1;netcore-2.2;netcore-3.0;netcore-3.1;netframework-4.7.2;netframework-4.8;netframework-4.8.1;netstandard-2.1" />
       <MemberType>Method</MemberType>
       <AssemblyInfo>
         <AssemblyName>System.Collections.Concurrent</AssemblyName>
@@ -1264,6 +1273,9 @@
               <AttributeName Language="F#">[&lt;System.Runtime.CompilerServices.Nullable(2)&gt;]</AttributeName>
             </Attribute>
           </Attributes>
+          <Constraints>
+            <ParameterAttribute>AllowByRefLike</ParameterAttribute>
+          </Constraints>
         </TypeParameter>
       </TypeParameters>
       <Parameters>
@@ -2714,7 +2726,7 @@ This member is an explicit interface member implementation. It can be used only
       </Docs>
     </Member>
     <Member MemberName="TryGetAlternateLookup&lt;TAlternateKey&gt;">
-      <MemberSignature Language="C#" Value="public bool TryGetAlternateLookup&lt;TAlternateKey&gt; (out System.Collections.Concurrent.ConcurrentDictionary&lt;TKey,TValue&gt;.AlternateLookup&lt;TAlternateKey&gt; lookup);" />
+      <MemberSignature Language="C#" Value="public bool TryGetAlternateLookup&lt;TAlternateKey&gt; (out System.Collections.Concurrent.ConcurrentDictionary&lt;TKey,TValue&gt;.AlternateLookup&lt;TAlternateKey&gt; lookup) where TAlternateKey : allows ref struct;" />
       <MemberSignature Language="ILAsm" Value=".method public hidebysig instance bool TryGetAlternateLookup&lt;TAlternateKey&gt;([out] valuetype System.Collections.Concurrent.ConcurrentDictionary`2/AlternateLookup`1&lt;!TKey, !TValue, !!TAlternateKey&gt;&amp; lookup) cil managed" />
       <MemberSignature Language="DocId" Value="M:System.Collections.Concurrent.ConcurrentDictionary`2.TryGetAlternateLookup``1(System.Collections.Concurrent.ConcurrentDictionary`2.AlternateLookup{`0,`1,``0}@)" />
       <MemberSignature Language="VB.NET" Value="Public Function TryGetAlternateLookup(Of TAlternateKey) (ByRef lookup As ConcurrentDictionary(Of TKey, TValue).AlternateLookup(Of TAlternateKey)) As Boolean" />
@@ -2736,7 +2748,11 @@ This member is an explicit interface member implementation. It can be used only
         <ReturnType>System.Boolean</ReturnType>
       </ReturnValue>
       <TypeParameters>
-        <TypeParameter Name="TAlternateKey" />
+        <TypeParameter Name="TAlternateKey">
+          <Constraints>
+            <ParameterAttribute>AllowByRefLike</ParameterAttribute>
+          </Constraints>
+        </TypeParameter>
       </TypeParameters>
       <Parameters>
         <Parameter Name="lookup" Type="System.Collections.Concurrent.ConcurrentDictionary&lt;TKey,TValue&gt;+AlternateLookup&lt;TAlternateKey&gt;" RefType="out" Index="0" FrameworkAlternate="net-9.0;net-10.0">

diff --git a/xml/System.Collections.Frozen/FrozenDictionary`2+AlternateLookup`1.xml b/xml/System.Collections.Frozen/FrozenDictionary`2+AlternateLookup`1.xml
@@ -1,5 +1,5 @@
 <Type Name="FrozenDictionary&lt;TKey,TValue&gt;+AlternateLookup&lt;TAlternateKey&gt;" FullName="System.Collections.Frozen.FrozenDictionary&lt;TKey,TValue&gt;+AlternateLookup&lt;TAlternateKey&gt;">
-  <TypeSignature Language="C#" Value="public readonly struct FrozenDictionary&lt;TKey,TValue&gt;.AlternateLookup&lt;TAlternateKey&gt;" />
+  <TypeSignature Language="C#" Value="public readonly struct FrozenDictionary&lt;TKey,TValue&gt;.AlternateLookup&lt;TAlternateKey&gt; where TAlternateKey : allows ref struct" />
   <TypeSignature Language="ILAsm" Value=".class nested public sequential ansi sealed beforefieldinit FrozenDictionary`2/AlternateLookup`1&lt;TKey, TValue, TAlternateKey&gt; extends System.ValueType" />
   <TypeSignature Language="DocId" Value="T:System.Collections.Frozen.FrozenDictionary`2.AlternateLookup`1" />
   <TypeSignature Language="VB.NET" Value="Public Structure FrozenDictionary(Of TKey, TValue).AlternateLookup(Of TAlternateKey)" />
@@ -20,7 +20,11 @@
         </Attribute>
       </Attributes>
     </TypeParameter>
-    <TypeParameter Name="TAlternateKey" />
+    <TypeParameter Name="TAlternateKey">
+      <Constraints>
+        <ParameterAttribute>AllowByRefLike</ParameterAttribute>
+      </Constraints>
+    </TypeParameter>
   </TypeParameters>
   <Base>
     <BaseTypeName>System.ValueType</BaseTypeName>