# System.Net.Http

``` diff
 namespace System.Net.Http {
     public sealed class SocketsHttpHandler : HttpMessageHandler {
+        public DistributedContextPropagator ActivityHeadersPropagator { get; set; }
+        public int InitialHttp2StreamWindowSize { get; set; }
-        public QuicImplementationProvider QuicImplementationProvider { get; set; }

     }
 }
```

