[Group 3] Enable nullable annotations for Microsoft.Extensions.Options.DataAnnotations (#65202)

Author: maxkoshevoi

src/libraries/Microsoft.Extensions.Options.DataAnnotations/ref/Microsoft.Extensions.Options.DataAnnotations.cs

@@ -17,8 +17,8 @@ namespace Microsoft.Extensions.Options
     public partial class DataAnnotationValidateOptions<[System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembers(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicProperties | System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.NonPublicProperties)] TOptions> : Microsoft.Extensions.Options.IValidateOptions<TOptions> where TOptions : class
     {
         [System.Diagnostics.CodeAnalysis.RequiresUnreferencedCodeAttribute("The implementation of Validate method on this type will walk through all properties of the passed in options object, and its type cannot be statically analyzed so its members may be trimmed.")]
-        public DataAnnotationValidateOptions(string name) { }
-        public string Name { get { throw null; } }
-        public Microsoft.Extensions.Options.ValidateOptionsResult Validate(string name, TOptions options) { throw null; }
+        public DataAnnotationValidateOptions(string? name) { }
+        public string? Name { get { throw null; } }
+        public Microsoft.Extensions.Options.ValidateOptionsResult Validate(string? name, TOptions options) { throw null; }
     }
 }

src/libraries/Microsoft.Extensions.Options.DataAnnotations/ref/Microsoft.Extensions.Options.DataAnnotations.csproj

@@ -1,6 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <TargetFrameworks>$(NetCoreAppCurrent);$(NetCoreAppMinimum);netstandard2.1;netstandard2.0;$(NetFrameworkMinimum)</TargetFrameworks>
+    <Nullable>enable</Nullable>
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="Microsoft.Extensions.Options.DataAnnotations.cs" />

src/libraries/Microsoft.Extensions.Options.DataAnnotations/src/DataAnnotationValidateOptions.cs

@@ -21,15 +21,15 @@ public class DataAnnotationValidateOptions<[DynamicallyAccessedMembers(Dynamical
         /// <param name="name">The name of the option.</param>
         [RequiresUnreferencedCode("The implementation of Validate method on this type will walk through all properties of the passed in options object, and its type cannot be " +
             "statically analyzed so its members may be trimmed.")]
-        public DataAnnotationValidateOptions(string name)
+        public DataAnnotationValidateOptions(string? name)
         {
             Name = name;
         }
 
         /// <summary>
         /// The options name.
         /// </summary>
-        public string Name { get; }
+        public string? Name { get; }
 
         /// <summary>
         /// Validates a specific named options instance (or all when <paramref name="name"/> is null).
@@ -39,7 +39,7 @@ public DataAnnotationValidateOptions(string name)
         /// <returns>The <see cref="ValidateOptionsResult"/> result.</returns>
         [UnconditionalSuppressMessage("ReflectionAnalysis", "IL2026:RequiresUnreferencedCode",
             Justification = "Suppressing the warnings on this method since the constructor of the type is annotated as RequiresUnreferencedCode.")]
-        public ValidateOptionsResult Validate(string name, TOptions options)
+        public ValidateOptionsResult Validate(string? name, TOptions options)
         {
             // Null name is used to configure all named options.
             if (Name != null && Name != name)

src/libraries/Microsoft.Extensions.Options.DataAnnotations/src/Microsoft.Extensions.Options.DataAnnotations.csproj

@@ -2,6 +2,7 @@
 
   <PropertyGroup>
     <TargetFrameworks>$(NetCoreAppCurrent);$(NetCoreAppMinimum);netstandard2.1;netstandard2.0;$(NetFrameworkMinimum)</TargetFrameworks>
+    <Nullable>enable</Nullable>
     <EnableDefaultItems>true</EnableDefaultItems>
     <!-- Use targeting pack references instead of granular ones in the project file. -->
     <DisableImplicitAssemblyReferences>false</DisableImplicitAssemblyReferences>