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Asked: 2026-05-19T06:05:58+00:00

I’ve created a simple WCF service inside of WebApplication project. [ServiceContract(Namespace = http://my.domain.com/service)] [AspNetCompatibilityRequirements(RequirementsMode

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I’ve created a simple WCF service inside of WebApplication project.

[ServiceContract(Namespace = "http://my.domain.com/service")]
[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
public class MyService
{
    [OperationContract]
    public string PublishProfile(out string enrollmentId, string registrationCode)
    {
        enrollmentId = null;
        return "Not supported";
    }

built – everything is compiled successfully

After that I’ve tried to open service in browser, I’ve got the following error:

Operation ‘PublishProfile’ in contract ‘MyService’ specifies an ‘out’ or ‘ref’ parameter. Operations with ‘out’ or ‘ref’ parameters are not supported

Can’t I use ‘out’ parameters?

What is wrong here?

Thanks

P.S. I use VS2008 SP1, .NET 3.5

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1 Answer

  1. Editorial Team

    The problem in my case was that default service configuration created in my ASP.NET application with Visual Studio wizard was a service type. Endpoint binding was “webHttpBinding”. As far as I understand now it is binding for REST services, and they just don’t have physical ability to work with out parameters. For them out parameter is not supported. And what I actually needed was a ‘basicHttpBinding” that allows to work with out parameters.

    Many thanks to everybody who helped me to figure out that.

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