回调继续.下面代码中的

(wcf服务器)，如果客户端断开连接，我希望代码继续处理。现在它跳到catch语句并停止处理。回调的目的是最终更新客户端请求的进度，但客户端可以在任何阶段断开连接，如果他想要继续处理。

   public void ChatToServer(string texttoServer) // send some text to the server
        {
            Logging.Write_To_Log_File("Entry", MethodBase.GetCurrentMethod().Name, "", "", "", 1);
            try
            {
                Thread.Sleep(5000);
                IMyContractCallBack callback = OperationContext.Current.GetCallbackChannel<IMyContractCallBack>();
                callback.callbacktoServer("Progress is 20% complete");
                // Some extremely important processing
                ....
                callback.callbacktoServer("Progress is 40% complete");
                // Some extremely important processing
                ....
                callback.callbacktoServer("Progress is 60% complete");
                // Some extremely important processing
                ....
                callback.callbacktoServer("Progress is 80% complete");    
                // Some extremely important processing
                ....
                callback.callbacktoServer("Progress is 100% complete");                                   
            }
            catch (Exception ex)
            {
            }
        }