[ServiceContract] public interface IContract {   void Test(int i);   void Test(string s); } public class MyService : IContract {   public void Test(int i)   {     Console.WriteLine(i);   }   public void Test(string s)   {     Console.WriteLine(s);   } } public class WcfTest {   public static void Test()   {     AppDomain.CreateDomain("Server1").DoCallBack(delegate     {       ServiceHost host = new ServiceHost(typeof(MyService), new Uri("http://localhost:8080/MyService"));       host.AddServiceEndpoint(typeof(IContract), new BasicHttpBinding(), "");       host.Open();     });     IContract channel = ChannelFactory<IContract>.CreateChannel(new BasicHttpBinding(), new EndpointAddress("http://localhost:8080/MyService"));     using (channel as IDisposable)     {       channel.Test(1);     }   } }

未处理 System.InvalidOperationException   Message="ContractDescription 'IContract' has zero operations; a contract must have at least one operation."   Source="System.ServiceModel"   StackTrace:     在 System.ServiceModel.Description.ContractDescription.EnsureInvariants()

[ServiceContract] public interface IContract {   [OperationContract(Name="Test1")]   void Test(int i);   [OperationContract(Name="Test2")]   void Test(string s); }