IAsyncResult IAnnouncementContract11.BeginHelloOperation(HelloMessage11 message, AsyncCallback callback, object state) { return(new HelloOperation11AsyncResult(this, message, callback, state)); }
void IAnnouncementContract11.HelloOperation(HelloMessage11 message) { Fx.Assert("The [....] method IAnnouncementContract11.HelloOperation must not get invoked. It is marked with PreferAsyncInvocation flag."); }