Error when publishing services with different namespaces

Hi, I have encountered the following error in the ?singleWsdl endpoint when porting some WCF services to .net core using CoreWCF.

An ExceptionDetail, likely created by IncludeExceptionDetailInFaults=true, whose value is:
System.NotSupportedException: A single WSDL document could not be generated for this service. Multiple service contract namespaces were found (http://my.company/ws/ServiceB/, http://my.company/ws/ServiceC/, urn:WorkflowWebService). Ensure that all your service contracts have the same namespace.
   at CoreWCF.Description.WsdlHelper.VerifyContractNamespace(List`1 wsdls)
   at CoreWCF.Description.WsdlHelper.GetSingleWsdl(MetadataSet metadataSet)
   at CoreWCF.Description.ServiceMetadataExtension.EnsureSingleWsdlInitialized()
   at CoreWCF.Description.ServiceMetadataExtension.get_SingleWsdl()
   at CoreWCF.Description.ServiceMetadataExtension.HttpGetImpl.TryHandleMetadataRequestAsync(HttpContext requestContext, IQueryCollection queries)
   at CoreWCF.Description.ServiceMetadataExtension.HttpGetImpl.ProcessHttpRequest(HttpContext requestContext)
   at CoreWCF.Description.ServiceMetadataExtension.HttpGetImpl.HandleRequest(HttpContext httpContext)

The error shows when invoking the ?singleWsdl endpoint but also there’s something weird when invoking the ?wsdl endpoint, as it shows import directives for types that are not actually needed for the specific service. Everything works fine if I register only one of the services, but I need all of them and they should have different namespaces.

The services are registered as follows:

app.UseServiceModel(wcfBuilder =>
{
  wcfBuilder.AddService<MyCompany.ServiceA>((serviceOptions) => { })
    .AddServiceEndpoint<MyCompany.ServiceA, MyCompany.IServiceA>(
    new CustomBasicHttpsBinding(), "/ws/ServiceA.svc");

  wcfBuilder.AddService<MyCompany.ServiceB>((serviceOptions) => { })
    .AddServiceEndpoint<MyCompany.ServiceB, MyCompany.ServiceB>(
    new CustomBasicHttpsBinding(), "/ws/ServiceB.svc");

  wcfBuilder.AddService<MyCompany.ServiceC>((serviceOptions) => { })
    .AddServiceEndpoint<MyCompany.ServiceC, MyCompany.ServiceC>(
      new CustomBasicHttpsBinding(), "/ws/ServiceC.svc");
});

The services are defined as follows:

[ServiceContractAttribute(Namespace = "urn:WorkflowWebService")]
public interface IServiceA
{
	[OperationContract(Action = "", ReplyAction = "*")]
	[XmlSerializerFormat(Style = OperationFormatStyle.Rpc, Use = OperationFormatUse.Encoded)]
	[return: MessageParameter(Name = "avviaProcessoReturn")]
	string avviaProcesso(string in0);
}

public class ServiceA: IServiceA
{
	...
}

[ServiceContract(Namespace = "http://my.company/ws/ServiceB/")]
[ServiceBehavior(IncludeExceptionDetailInFaults = true)]
public class ServiceB
{
	[OperationContract]
	public string MyOperation(string request)
	{

	}
}

[ServiceContract(Namespace = "http://my.company/ws/ServiceC/")]
[ServiceBehavior(IncludeExceptionDetailInFaults = true)]
public class ServiceC
{
	[OperationContract]
	public string MyOperation(string request)
	{

	}
}

Do you have any suggestion?

[mconnew]

I understand the problem and should have a fix available within a couple of weeks.

[mconnew]

I have a PR (#660) out with a fix. It would be helpful if anyone is able to make a local build based off the PR (or just clone my fork and checkout my branch) and test it as an extra verification.