Cannot have two operations in the same contract with the same name (Async & Non)

Question

I get the following exception (Cannot have two operations in the same contract with the same name, methods ExecuteAsync and Execute) when the following service is activated.

Answer 1

Try adding the name in OperationMethod to make it more simpler.

[ServiceContract]
public interface IMyService
{
    [OperationContract(Name = "Service1")]
    byte[] Execute(MyRequest request);

    [OperationContract(Name = "Service2")]
    Task ExecuteAsync(MyRequest request);
}