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

Microsoft.AspNetCore.Http.Extensions

 {
     namespace Microsoft.AspNetCore.Http {
+        public static class HttpContextServerVariableExtensions {
+            public static string GetServerVariable(this HttpContext context, string variableName);
+        }
         public static class ResponseExtensions {
+            public static void Redirect(this HttpResponse response, string location, bool permanent, bool preserveMethod);
         }
     }
 }