dotnet-core/release-notes/3.0/api-diff/Asp.Net/3.0.0_Microsoft.Extensions.Http.Polly.md

Microsoft.Extensions.Http.Polly

 {
     namespace Microsoft.Extensions.DependencyInjection {
         public static class PollyHttpClientBuilderExtensions {
+            public static IHttpClientBuilder AddPolicyHandler(this IHttpClientBuilder builder, Func<IServiceProvider, HttpRequestMessage, string, IAsyncPolicy<HttpResponseMessage>> policyFactory, Func<HttpRequestMessage, string> keySelector);
         }
     }
 }