IAsyncResult IAnnouncementContractApril2005.BeginHelloOperation(HelloMessageApril2005 message, AsyncCallback callback, object state)
 {
     return(new HelloOperationApril2005AsyncResult(this, message, callback, state));
 }
 void IAnnouncementContractApril2005.HelloOperation(HelloMessageApril2005 message)
 {
     Fx.Assert("The [....] method IAnnouncementContractApril2005.HelloOperation must not get invoked. It is marked with PreferAsyncInvocation flag.");
 }