Using WCF RIA service in non-Silverlight .NET application

[Tesic Goran]

Hi, I have a problem to use one type of WCF RIA service in non-Silverlight .NET application. For example, I want to use it in WPF application. I know how to use domain service that has method like this:

[Query(IsDefault = true)]
public IQueryable GetContinents()
{
return this.ObjectContext.Continents;
}

But, when I try to add some custom method to domain service class, which is decorated with [Invoke] attribute:

[Invoke]
public string MakeWordUpper(string text)
{
return text.ToUpper();
}

it's not visible in "Add Service Reference" dialog in WPF application. Only GetContinents method is visible. How can I make it work? Thank you in advance.