Pass DeprecationPolicyManager through all service layers

Matthias Gessinger · Matthias Gessinger · commit fb3935427e78 · 2025-11-26T20:02:07.000+01:00
diff --git a/src/AspNet/OData/src/Asp.Versioning.WebApi.OData.ApiExplorer/ApiExplorer/ODataApiExplorer.cs b/src/AspNet/OData/src/Asp.Versioning.WebApi.OData.ApiExplorer/ApiExplorer/ODataApiExplorer.cs
@@ -566,6 +566,7 @@ private void PopulateActionDescriptions(
                 ApiVersion = apiVersion,
                 IsDeprecated = deprecated,
                 SunsetPolicy = SunsetPolicyManager.ResolvePolicyOrDefault( metadata.Name, apiVersion ),
+                DeprecationPolicy = DeprecationPolicyManager.ResolvePolicyOrDefault( metadata.Name, apiVersion ),
                 Properties = { [typeof( IEdmModel )] = routeBuilderContext.EdmModel },
             };
 
diff --git a/src/AspNet/OData/test/Asp.Versioning.WebApi.OData.Tests/Controllers/VersionedMetadataControllerTest.cs b/src/AspNet/OData/test/Asp.Versioning.WebApi.OData.Tests/Controllers/VersionedMetadataControllerTest.cs
@@ -33,6 +33,9 @@ public async Task options_should_return_expected_headers()
         resolver.AddService(
             typeof( ISunsetPolicyManager ),
             ( sp, t ) => new SunsetPolicyManager( sp.GetRequiredService<HttpConfiguration>().GetApiVersioningOptions() ) );
+        resolver.AddService(
+            typeof( IDeprecationPolicyManager ),
+            ( sp, t ) => new DeprecationPolicyManager( sp.GetRequiredService<HttpConfiguration>().GetApiVersioningOptions() ) );
         configuration.DependencyResolver = resolver;
         configuration.AddApiVersioning(
             options =>
diff --git a/src/AspNet/WebApi/src/Asp.Versioning.WebApi.ApiExplorer/ApiExplorer/VersionedApiExplorer.cs b/src/AspNet/WebApi/src/Asp.Versioning.WebApi.ApiExplorer/ApiExplorer/VersionedApiExplorer.cs
@@ -33,6 +33,7 @@ public class VersionedApiExplorer : IApiExplorer
     private readonly Lazy<ApiDescriptionGroupCollection> apiDescriptionsHolder;
     private IDocumentationProvider? documentationProvider;
     private ISunsetPolicyManager? sunsetPolicyManager;
+    private IDeprecationPolicyManager? deprecationPolicyManager;
 
     /// <summary>
     /// Initializes a new instance of the <see cref="VersionedApiExplorer"/> class.
@@ -105,6 +106,16 @@ protected ISunsetPolicyManager SunsetPolicyManager
         set => sunsetPolicyManager = value;
     }
 
+    /// <summary>
+    /// Gets or sets the manager used to resolve deprecation policies for API descriptions.
+    /// </summary>
+    /// <value>The configured <see cref="IDeprecationPolicyManager">deprecation policy manager</see>.</value>
+    protected IDeprecationPolicyManager DeprecationPolicyManager
+    {
+        get => deprecationPolicyManager ??= Configuration.GetDeprecationPolicyManager();
+        set => deprecationPolicyManager = value;
+    }
+
     /// <summary>
     /// Gets a collection of HTTP methods supported by the action.
     /// </summary>
@@ -227,11 +238,13 @@ protected virtual ApiDescriptionGroupCollection InitializeApiDescriptions()
         }
 
         var routes = FlattenRoutes( Configuration.Routes ).ToArray();
-        var policyManager = Configuration.GetSunsetPolicyManager();
+        var sunsetPolicyManager = Configuration.GetSunsetPolicyManager();
+        var deprecationPolicyManager = Configuration.GetDeprecationPolicyManager();
 
         foreach ( var apiVersion in FlattenApiVersions( controllerMappings ) )
         {
-            var sunsetPolicy = policyManager.TryGetPolicy( apiVersion, out var policy ) ? policy : default;
+            sunsetPolicyManager.TryGetPolicy( apiVersion, out var sunsetPolicy );
+            deprecationPolicyManager.TryGetPolicy( apiVersion, out var deprecationPolicy );
 
             for ( var i = 0; i < routes.Length; i++ )
             {
@@ -244,6 +257,7 @@ protected virtual ApiDescriptionGroupCollection InitializeApiDescriptions()
                         ExploreRouteControllers( controllerMappings, route, apiVersion );
 
                 apiDescriptionGroup.SunsetPolicy = sunsetPolicy;
+                apiDescriptionGroup.DeprecationPolicy = deprecationPolicy;
 
                 // Remove ApiDescription that will lead to ambiguous action matching.
                 // E.g. a controller with Post() and PostComment(). When the route template is {controller}, it produces POST /controller and POST /controller.
@@ -878,6 +892,7 @@ private void PopulateActionDescriptions(
                 ApiVersion = apiVersion,
                 IsDeprecated = deprecated,
                 SunsetPolicy = SunsetPolicyManager.ResolvePolicyOrDefault( metadata.Name, apiVersion ),
+                DeprecationPolicy = DeprecationPolicyManager.ResolvePolicyOrDefault( metadata.Name, apiVersion ),
             };
 
             foreach ( var supportedResponseFormatter in supportedResponseFormatters )
diff --git a/src/AspNet/WebApi/src/Asp.Versioning.WebApi.ApiExplorer/Description/ApiDescriptionGroup.cs b/src/AspNet/WebApi/src/Asp.Versioning.WebApi.ApiExplorer/Description/ApiDescriptionGroup.cs
@@ -51,6 +51,12 @@ public ApiDescriptionGroup( ApiVersion apiVersion, string name )
     /// <value>The defined sunset policy defined for the API, if any.</value>
     public SunsetPolicy? SunsetPolicy { get; set; }
 
+    /// <summary>
+    /// Gets or sets described API deprecation policy.
+    /// </summary>
+    /// <value>The defined deprecation policy defined for the API, if any.</value>
+    public DeprecationPolicy? DeprecationPolicy { get; set; }
+
     /// <summary>
     /// Gets a collection of API descriptions for the current version.
     /// </summary>
diff --git a/src/AspNet/WebApi/src/Asp.Versioning.WebApi.ApiExplorer/Description/VersionedApiDescription.cs b/src/AspNet/WebApi/src/Asp.Versioning.WebApi.ApiExplorer/Description/VersionedApiDescription.cs
@@ -49,6 +49,12 @@ public ApiVersion ApiVersion
     /// <value>The defined <see cref="Versioning.SunsetPolicy">sunset policy</see> defined for the API, if any.</value>
     public SunsetPolicy? SunsetPolicy { get; set; }
 
+    /// <summary>
+    /// Gets or sets the described API deprecation policy.
+    /// </summary>
+    /// <value>The defined <see cref="Versioning.DeprecationPolicy">deprecation policy</see> defined for the API, if any.</value>
+    public DeprecationPolicy? DeprecationPolicy { get; set; }
+
     /// <summary>
     /// Gets or sets the response description.
     /// </summary>
diff --git a/src/AspNet/WebApi/src/Asp.Versioning.WebApi/DependencyResolverExtensions.cs b/src/AspNet/WebApi/src/Asp.Versioning.WebApi/DependencyResolverExtensions.cs
@@ -38,4 +38,8 @@ internal static IProblemDetailsFactory GetProblemDetailsFactory( this HttpConfig
     internal static ISunsetPolicyManager GetSunsetPolicyManager( this HttpConfiguration configuration ) =>
         configuration.DependencyResolver.GetService<ISunsetPolicyManager>() ??
         configuration.ApiVersioningServices().GetRequiredService<ISunsetPolicyManager>();
+
+    internal static IDeprecationPolicyManager GetDeprecationPolicyManager( this HttpConfiguration configuration ) =>
+        configuration.DependencyResolver.GetService<IDeprecationPolicyManager>() ??
+        configuration.ApiVersioningServices().GetRequiredService<IDeprecationPolicyManager>();
 }
diff --git a/src/AspNetCore/OData/src/Asp.Versioning.OData.ApiExplorer/ApiExplorer/ODataApiDescriptionProvider.cs b/src/AspNetCore/OData/src/Asp.Versioning.OData.ApiExplorer/ApiExplorer/ODataApiDescriptionProvider.cs
@@ -15,8 +15,8 @@ namespace Asp.Versioning.ApiExplorer;
 using Microsoft.OData.Edm;
 using System.Diagnostics.CodeAnalysis;
 using System.Runtime.CompilerServices;
-using static System.StringComparison;
 using static ODataMetadataOptions;
+using static System.StringComparison;
 using Opts = Microsoft.Extensions.Options.Options;
 
 /// <summary>
@@ -181,10 +181,11 @@ protected virtual void ExploreQueryOptions( IEnumerable<ApiDescription> apiDescr
     [MethodImpl( MethodImplOptions.AggressiveInlining )]
     private static int ApiVersioningOrder()
     {
-        var policyManager = new SunsetPolicyManager( Opts.Create( new ApiVersioningOptions() ) );
+        var sunsetPolicyManager = new SunsetPolicyManager( Opts.Create( new ApiVersioningOptions() ) );
+        var deprecationPolicyManager = new DeprecationPolicyManager( Opts.Create( new ApiVersioningOptions() ) );
         var options = Opts.Create( new ApiExplorerOptions() );
         var provider = new EmptyModelMetadataProvider();
-        return new VersionedApiDescriptionProvider( policyManager, provider, options ).Order;
+        return new VersionedApiDescriptionProvider( sunsetPolicyManager, deprecationPolicyManager, provider, options ).Order;
     }
 
     [MethodImpl( MethodImplOptions.AggressiveInlining )]
diff --git a/src/AspNetCore/WebApi/src/Asp.Versioning.Http/ApiExplorer/ApiVersionDescription.cs b/src/AspNetCore/WebApi/src/Asp.Versioning.Http/ApiExplorer/ApiVersionDescription.cs
@@ -14,16 +14,19 @@ public class ApiVersionDescription
     /// <param name="groupName">The group name for the API version.</param>
     /// <param name="deprecated">Indicates whether the API version is deprecated.</param>
     /// <param name="sunsetPolicy">The defined <see cref="SunsetPolicy">sunset policy</see>, if any.</param>
+    /// <param name="deprecationPolicy">The defined <see cref="DeprecationPolicy">deprecation policy</see>, if any.</param>
     public ApiVersionDescription(
         ApiVersion apiVersion,
         string groupName,
         bool deprecated = false,
-        SunsetPolicy? sunsetPolicy = default )
+        SunsetPolicy? sunsetPolicy = default,
+        DeprecationPolicy? deprecationPolicy = default )
     {
         ApiVersion = apiVersion;
         GroupName = groupName;
         IsDeprecated = deprecated;
         SunsetPolicy = sunsetPolicy;
+        DeprecationPolicy = deprecationPolicy;
     }
 
     /// <summary>
@@ -54,4 +57,10 @@ public ApiVersionDescription(
     /// </summary>
     /// <value>The defined sunset policy defined for the API, if any.</value>
     public SunsetPolicy? SunsetPolicy { get; }
+
+    /// <summary>
+    /// Gets described API deprecation policy.
+    /// </summary>
+    /// <value>The defined deprecation policy defined for the API, if any.</value>
+    public DeprecationPolicy? DeprecationPolicy { get; }
 }
diff --git a/src/AspNetCore/WebApi/src/Asp.Versioning.Http/DependencyInjection/IServiceCollectionExtensions.cs b/src/AspNetCore/WebApi/src/Asp.Versioning.Http/DependencyInjection/IServiceCollectionExtensions.cs
@@ -144,6 +144,7 @@ private static void AddApiVersioningServices( IServiceCollection services )
         services.AddSingleton( static sp => sp.GetRequiredService<IOptions<ApiVersioningOptions>>().Value.ApiVersionSelector );
         services.TryAddSingleton<IReportApiVersions, DefaultApiVersionReporter>();
         services.TryAddSingleton<ISunsetPolicyManager, SunsetPolicyManager>();
+        services.TryAddSingleton<IDeprecationPolicyManager, DeprecationPolicyManager>();
         services.TryAddEnumerable( Transient<IValidateOptions<ApiVersioningOptions>, ValidateApiVersioningOptions>() );
         services.TryAddEnumerable( Transient<IPostConfigureOptions<RouteOptions>, ApiVersioningRouteOptionsSetup>() );
         services.TryAddEnumerable( Singleton<MatcherPolicy, ApiVersionMatcherPolicy>() );
@@ -281,7 +282,7 @@ private static void TryAddErrorObjectJsonOptions( IServiceCollection services )
         }
     }
 
-// TEMP: this is a marker class to test whether Error Objects have been explicitly added. remove in 9.0+
+    // TEMP: this is a marker class to test whether Error Objects have been explicitly added. remove in 9.0+
 #pragma warning disable CA1812 // Avoid uninstantiated internal classes
     private sealed class ErrorObjectsAdded { }
 }
diff --git a/src/AspNetCore/WebApi/src/Asp.Versioning.Mvc.ApiExplorer/ApiDescriptionExtensions.cs b/src/AspNetCore/WebApi/src/Asp.Versioning.Mvc.ApiExplorer/ApiDescriptionExtensions.cs
@@ -65,11 +65,20 @@ public static bool IsDeprecated( this ApiDescription apiDescription )
     /// Sets the API sunset policy associated with the API description.
     /// </summary>
     /// <param name="apiDescription">The <see cref="ApiDescription">API description</see> to set the sunset policy for.</param>
-    /// <param name="sunsetPolicy">The associated <see cref="SunsetPolicy">sunst policy</see>.</param>
+    /// <param name="sunsetPolicy">The associated <see cref="SunsetPolicy">sunset policy</see>.</param>
     /// <remarks>This API is meant for infrastructure and should not be used by application code.</remarks>
     [EditorBrowsable( EditorBrowsableState.Never )]
     public static void SetSunsetPolicy( this ApiDescription apiDescription, SunsetPolicy sunsetPolicy ) => apiDescription.SetProperty( sunsetPolicy );
 
+    /// <summary>
+    /// Sets the API deprecation policy associated with the API description.
+    /// </summary>
+    /// <param name="apiDescription">The <see cref="ApiDescription">API description</see> to set the sunset policy for.</param>
+    /// <param name="deprecationPolicy">The associated <see cref="DeprecationPolicy">deprecation policy</see>.</param>
+    /// <remarks>This API is meant for infrastructure and should not be used by application code.</remarks>
+    [EditorBrowsable( EditorBrowsableState.Never )]
+    public static void SetDeprecationPolicy( this ApiDescription apiDescription, DeprecationPolicy deprecationPolicy ) => apiDescription.SetProperty( deprecationPolicy );
+
     /// <summary>
     /// Attempts to update the relate path of the specified API description and remove the corresponding parameter according to the specified options.
     /// </summary>
diff --git a/src/AspNetCore/WebApi/src/Asp.Versioning.Mvc.ApiExplorer/ApiVersionDescriptionProviderFactory.cs b/src/AspNetCore/WebApi/src/Asp.Versioning.Mvc.ApiExplorer/ApiVersionDescriptionProviderFactory.cs
@@ -12,17 +12,20 @@ namespace Microsoft.AspNetCore.Builder;
 internal sealed class ApiVersionDescriptionProviderFactory : IApiVersionDescriptionProviderFactory
 {
     private readonly ISunsetPolicyManager sunsetPolicyManager;
+    private readonly IDeprecationPolicyManager deprecationPolicyManager;
     private readonly IApiVersionMetadataCollationProvider[] providers;
     private readonly IEndpointInspector endpointInspector;
     private readonly IOptions<ApiExplorerOptions> options;
 
     public ApiVersionDescriptionProviderFactory(
         ISunsetPolicyManager sunsetPolicyManager,
+        IDeprecationPolicyManager deprecationPolicyManager,
         IEnumerable<IApiVersionMetadataCollationProvider> providers,
         IEndpointInspector endpointInspector,
         IOptions<ApiExplorerOptions> options )
     {
         this.sunsetPolicyManager = sunsetPolicyManager;
+        this.deprecationPolicyManager = deprecationPolicyManager;
         this.providers = providers.ToArray();
         this.endpointInspector = endpointInspector;
         this.options = options;
@@ -37,6 +40,6 @@ public IApiVersionDescriptionProvider Create( EndpointDataSource endpointDataSou
 
         collators.AddRange( providers );
 
-        return new DefaultApiVersionDescriptionProvider( collators, sunsetPolicyManager, options );
+        return new DefaultApiVersionDescriptionProvider( collators, sunsetPolicyManager, deprecationPolicyManager, options );
     }
 }
diff --git a/src/AspNetCore/WebApi/src/Asp.Versioning.Mvc.ApiExplorer/DefaultApiVersionDescriptionProvider.cs b/src/AspNetCore/WebApi/src/Asp.Versioning.Mvc.ApiExplorer/DefaultApiVersionDescriptionProvider.cs
@@ -20,15 +20,18 @@ public class DefaultApiVersionDescriptionProvider : IApiVersionDescriptionProvid
     /// <param name="providers">The <see cref="IEnumerable{T}">sequence</see> of
     /// <see cref="IApiVersionMetadataCollationProvider">API version metadata collation providers.</see>.</param>
     /// <param name="sunsetPolicyManager">The <see cref="ISunsetPolicyManager">manager</see> used to resolve sunset policies.</param>
+    /// <param name="deprecationPolicyManager">The <see cref="IDeprecationPolicyManager">manager</see> used to resolve deprecation policies.</param>
     /// <param name="apiExplorerOptions">The <see cref="IOptions{TOptions}">container</see> of configured
     /// <see cref="ApiExplorerOptions">API explorer options</see>.</param>
     public DefaultApiVersionDescriptionProvider(
         IEnumerable<IApiVersionMetadataCollationProvider> providers,
         ISunsetPolicyManager sunsetPolicyManager,
+        IDeprecationPolicyManager deprecationPolicyManager,
         IOptions<ApiExplorerOptions> apiExplorerOptions )
     {
         collection = new( Describe, providers ?? throw new ArgumentNullException( nameof( providers ) ) );
         SunsetPolicyManager = sunsetPolicyManager;
+        DeprecationPolicyManager = deprecationPolicyManager;
         options = apiExplorerOptions;
     }
 
@@ -38,6 +41,12 @@ public DefaultApiVersionDescriptionProvider(
     /// <value>The associated <see cref="ISunsetPolicyManager">sunset policy manager</see>.</value>
     protected ISunsetPolicyManager SunsetPolicyManager { get; }
 
+    /// <summary>
+    /// Gets the manager used to resolve deprecation policies.
+    /// </summary>
+    /// <value>The associated <see cref="IDeprecationPolicyManager">deprecation policy manager</see>.</value>
+    protected IDeprecationPolicyManager DeprecationPolicyManager { get; }
+
     /// <summary>
     /// Gets the options associated with the API explorer.
     /// </summary>
@@ -64,7 +73,7 @@ protected virtual IReadOnlyList<ApiVersionDescription> Describe( IReadOnlyList<A
         // REF: https://github.com/dotnet/aspnet-api-versioning/issues/1066
         if ( metadata is GroupedApiVersionMetadata[] groupedMetadata )
         {
-            return DescriptionProvider.Describe( groupedMetadata, SunsetPolicyManager, Options );
+            return DescriptionProvider.Describe( groupedMetadata, SunsetPolicyManager, DeprecationPolicyManager, Options );
         }
 
         return Array.Empty<ApiVersionDescription>();
diff --git a/src/AspNetCore/WebApi/src/Asp.Versioning.Mvc.ApiExplorer/DependencyInjection/IApiVersioningBuilderExtensions.cs b/src/AspNetCore/WebApi/src/Asp.Versioning.Mvc.ApiExplorer/DependencyInjection/IApiVersioningBuilderExtensions.cs
@@ -61,6 +61,7 @@ private static void AddApiExplorerServices( IApiVersioningBuilder builder )
             Transient<IApiDescriptionProvider, VersionedApiDescriptionProvider>(
                 static sp => new(
                     sp.GetRequiredService<ISunsetPolicyManager>(),
+                    sp.GetRequiredService<IDeprecationPolicyManager>(),
                     sp.GetRequiredService<IModelMetadataProvider>(),
                     sp.GetRequiredService<IInlineConstraintResolver>(),
                     sp.GetRequiredService<IOptions<ApiExplorerOptions>>() ) ) );
diff --git a/src/AspNetCore/WebApi/src/Asp.Versioning.Mvc.ApiExplorer/GroupedApiVersionDescriptionProvider.cs b/src/AspNetCore/WebApi/src/Asp.Versioning.Mvc.ApiExplorer/GroupedApiVersionDescriptionProvider.cs
@@ -20,15 +20,18 @@ public class GroupedApiVersionDescriptionProvider : IApiVersionDescriptionProvid
     /// <param name="providers">The <see cref="IEnumerable{T}">sequence</see> of
     /// <see cref="IApiVersionMetadataCollationProvider">API version metadata collation providers.</see>.</param>
     /// <param name="sunsetPolicyManager">The <see cref="ISunsetPolicyManager">manager</see> used to resolve sunset policies.</param>
+    /// <param name="deprecationPolicyManager">The <see cref="IDeprecationPolicyManager">manager</see> used to resolve deprecation policies.</param>
     /// <param name="apiExplorerOptions">The <see cref="IOptions{TOptions}">container</see> of configured
     /// <see cref="ApiExplorerOptions">API explorer options</see>.</param>
     public GroupedApiVersionDescriptionProvider(
         IEnumerable<IApiVersionMetadataCollationProvider> providers,
         ISunsetPolicyManager sunsetPolicyManager,
+        IDeprecationPolicyManager deprecationPolicyManager,
         IOptions<ApiExplorerOptions> apiExplorerOptions )
     {
         collection = new( Describe, providers ?? throw new ArgumentNullException( nameof( providers ) ) );
         SunsetPolicyManager = sunsetPolicyManager;
+        DeprecationPolicyManager = deprecationPolicyManager;
         options = apiExplorerOptions;
     }
 
@@ -38,6 +41,12 @@ public GroupedApiVersionDescriptionProvider(
     /// <value>The associated <see cref="ISunsetPolicyManager">sunset policy manager</see>.</value>
     protected ISunsetPolicyManager SunsetPolicyManager { get; }
 
+    /// <summary>
+    /// Gets the manager used to resolve deprecation policies.
+    /// </summary>
+    /// <value>The associated <see cref="IDeprecationPolicyManager">deprecation policy manager</see>.</value>
+    protected IDeprecationPolicyManager DeprecationPolicyManager { get; }
+
     /// <summary>
     /// Gets the options associated with the API explorer.
     /// </summary>
@@ -57,7 +66,7 @@ public GroupedApiVersionDescriptionProvider(
     protected virtual IReadOnlyList<ApiVersionDescription> Describe( IReadOnlyList<GroupedApiVersionMetadata> metadata )
     {
         ArgumentNullException.ThrowIfNull( metadata );
-        return DescriptionProvider.Describe( metadata, SunsetPolicyManager, Options );
+        return DescriptionProvider.Describe( metadata, SunsetPolicyManager, DeprecationPolicyManager, Options );
     }
 
     /// <summary>
diff --git a/src/AspNetCore/WebApi/src/Asp.Versioning.Mvc.ApiExplorer/Internal/DescriptionProvider.cs b/src/AspNetCore/WebApi/src/Asp.Versioning.Mvc.ApiExplorer/Internal/DescriptionProvider.cs
diff --git a/src/AspNetCore/WebApi/src/Asp.Versioning.Mvc.ApiExplorer/VersionedApiDescriptionProvider.cs b/src/AspNetCore/WebApi/src/Asp.Versioning.Mvc.ApiExplorer/VersionedApiDescriptionProvider.cs

Original file line number	Diff line number	Diff line change
`@@ -38,4 +38,8 @@ internal static IProblemDetailsFactory GetProblemDetailsFactory( this HttpConfig`
`38`	`38`	`internal static ISunsetPolicyManager GetSunsetPolicyManager( this HttpConfiguration configuration ) =>`
`39`	`39`	`configuration.DependencyResolver.GetService<ISunsetPolicyManager>() ??`
`40`	`40`	`configuration.ApiVersioningServices().GetRequiredService<ISunsetPolicyManager>();`
	`41`	`+`
	`42`	`+ internal static IDeprecationPolicyManager GetDeprecationPolicyManager( this HttpConfiguration configuration ) =>`
	`43`	`+ configuration.DependencyResolver.GetService<IDeprecationPolicyManager>() ??`
	`44`	`+ configuration.ApiVersioningServices().GetRequiredService<IDeprecationPolicyManager>();`
`41`	`45`	`}`
Original file line number	Diff line number	Diff line change
`@@ -144,6 +144,7 @@ private static void AddApiVersioningServices( IServiceCollection services )`
`144`	`144`	`services.AddSingleton( static sp => sp.GetRequiredService<IOptions<ApiVersioningOptions>>().Value.ApiVersionSelector );`
`145`	`145`	`services.TryAddSingleton<IReportApiVersions, DefaultApiVersionReporter>();`
`146`	`146`	`services.TryAddSingleton<ISunsetPolicyManager, SunsetPolicyManager>();`
	`147`	`+ services.TryAddSingleton<IDeprecationPolicyManager, DeprecationPolicyManager>();`
`147`	`148`	`services.TryAddEnumerable( Transient<IValidateOptions<ApiVersioningOptions>, ValidateApiVersioningOptions>() );`
`148`	`149`	`services.TryAddEnumerable( Transient<IPostConfigureOptions<RouteOptions>, ApiVersioningRouteOptionsSetup>() );`
`149`	`150`	`services.TryAddEnumerable( Singleton<MatcherPolicy, ApiVersionMatcherPolicy>() );`
`@@ -281,7 +282,7 @@ private static void TryAddErrorObjectJsonOptions( IServiceCollection services )`
`281`	`282`	`}`
`282`	`283`	`}`
`283`	`284`
`284`		`-// TEMP: this is a marker class to test whether Error Objects have been explicitly added. remove in 9.0+`
	`285`	`+ // TEMP: this is a marker class to test whether Error Objects have been explicitly added. remove in 9.0+`
`285`	`286`	`#pragma warning disable CA1812 // Avoid uninstantiated internal classes`
`286`	`287`	`private sealed class ErrorObjectsAdded { }`
`287`	`288`	`}`