用户代码未处理 System.ServiceModel.CommunicationException Message="远程服务器返回了错误: NotFound。" StackTrace: 位于 System.ServiceModel.AsyncResult.End[TAsyncResult](IAsyncResult result) 位于 System.ServiceModel.Channels.ServiceChannel.EndCall(String action, Object[] outs, IAsyncResult result) 位于 System.ServiceModel.ClientBase`1.ChannelBase`1.EndInvoke(String methodName, Object[] args, IAsyncResult result) 位于 HelloWcf.HelloService.ServiceClient.ServiceClientChannel.EndSayHello(IAsyncResult result) 位于 HelloWcf.HelloService.ServiceClient.HelloWcf.HelloService.IService.EndSayHello(IAsyncResult result) 位于 HelloWcf.HelloService.ServiceClient.OnEndSayHello(IAsyncResult result) 位于 System.ServiceModel.ClientBase`1.OnAsyncCallCompleted(IAsyncResult result) InnerException: System.Net.WebException Message="远程服务器返回了错误: NotFound。" StackTrace: 位于 System.Net.Browser.AsyncHelper.BeginOnUI(SendOrPostCallback beginMethod, Object state) 位于 System.Net.Browser.BrowserHttpWebRequest.EndGetResponse(IAsyncResult asyncResult) 位于 System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelAsyncRequest.CompleteGetResponse(IAsyncResult result) InnerException: System.Net.WebException Message="远程服务器返回了错误: NotFound。" StackTrace: 位于 System.Net.Browser.BrowserHttpWebRequest.InternalEndGetResponse(IAsyncResult asyncResult) 位于 System.Net.Browser.BrowserHttpWebRequest.<>c__DisplayClass5.b__4(Object sendState) 位于 System.Net.Browser.AsyncHelper.<>c__DisplayClass2.b__0(Object sendState) InnerException:
怎么解决的