Invalid opertion exception when I open a nettcpbinding WCF service

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C#

WCFService

Good morning everyone,

I’m working on a windows application that is hosting a WCF service.
I’m using NetTcpBinding and when I try to open a connection an InvalidOpenException is thrown with this message:
ContractDescption 'IHyperisCommonService' contains no operation; a contract must contain at least an operation.
But in my case my interface looks like this:

[ServiceContract]
public interface IHyperisCommonService
{
   Guid IsOnLine(Guid message);
}

The worst thing is I already use this interface with another application and I don’t get the problem.

Here the code I use:

ServiceHost serviceHostStatus = new ServiceHost(typeof(Hyperis.Common.HyperisCommonService));
NetTcpBinding serviceHostBinding = new NetTcpBinding();
serviceHostStatus.AddServiceEndpoint(typeof(Hyperis.Common.IHyperisCommonService), serviceHostBinding, new Uri("net.tcp://localhost:5000/HyperisCommonService"));
serviceHostStatus.Open();

Anybody have a clue ?

Thanks for helping.


What I have tried:

I already use this WCF service with a previous application on the same machine.