Interfaces with protobuf-net and C#

Question

Does anybody know what is the right way to set up a ProtoContract for an Interface?

I get the following exception \"The type cannot be

Answer 1

Interesting; yes, it looks like something is up there. However, it does work when exposed as a member, i.e.

[ProtoContract]
class Wrapper
{
    [ProtoMember(1)]
    public ILesson5TestInteface1 Content { get; set; }
}
static class Program
{
    static void Main()
    {
        Wrapper obj = new Wrapper
        {
            Content = new Lesson5TestClass2()
        }, clone;
        using(var ms = new MemoryStream())
        {
            Serializer.Serialize(ms, obj);
            ms.Position = 0;
            clone = Serializer.Deserialize(ms);
        }
        // here clone.Content *is* a Lesson5TestClass2 instance
    }
}

I will have to look to see what is up with interface support as the root object.