# Microsoft.Net.Http.Headers

``` diff
 namespace Microsoft.Net.Http.Headers {
     public static class HeaderNames {
+        public static readonly string AltSvc;
+        public static readonly string GrpcAcceptEncoding;
+        public static readonly string GrpcEncoding;
+        public static readonly string GrpcMessage;
+        public static readonly string GrpcStatus;
+        public static readonly string GrpcTimeout;
+        public static readonly string XRequestedWith;
     }
     public class SetCookieHeaderValue {
+        public IList<StringSegment> Extensions { get; }
     }
 }
```

