Wcf system.servicemodel.communicationexception。在system.servicemodel.ni.dll中

当我在windows phone应用程序中调用WCF服务时，我遇到了这个错误。 请为同样的问题提出一些解决方案

示例代码：

   private void Button_Click_1(object sender, RoutedEventArgs e)
   {

       ServiceReference1.ServiceClient myService = new ServiceReference1.ServiceClient();
       if (txtUser.Text.ToString() != null)
       {


           myService.ValidateAsync(txtUser.Text.ToString(), pwdPassword.ToString());
           System.Threading.Thread.Sleep(TimeSpan.FromSeconds(20));
           myService.ValidateCompleted += new EventHandler<ServiceReference1.ValidateCompletedEventArgs>(myService_ValidateCompleted);
       }
       else
       {
           MessageBox.Show("Enter some username or password");
       }
   }

包括一个挡块

catch (CommunicationException commProblem)
{
     Console.WriteLine("There was a communication problem. " + commProblem.Message + commProblem.StackTrace);
     Console.Read();     
}

catch (CommunicationException commProblem)
{
     Console.WriteLine("There was a communication problem. " + commProblem.Message + commProblem.StackTrace);
     Console.Read();     
}