How to resolve the $ref to same calss name but with different namespace?

[vbtang]

hi,
If I have two classes with same class name but in different namespace, when I generate schema for TestSameNamespace, how do I tell the schema loader that the $ref schems is from TestNamespace.Test1 rather than Test1?
Do I have to rename one of them to prevent the ambiguity? Or do we have any settings to prevent this?

    // Test1.dlll
    class Test1
    {
        public int Test;
    }

    // TestNameSpace.dll
    namespace TestNamespace
    {
        public class Test1
        {
            public string Test;
        }
    }

    using namespace TestNamespace;
    class TestSameNamespace
    {
        public Test1 Test1;
    }