I am trying to make a .NET class (.NET 2.0/C#)  to be used in VB6.

I created Class Library Project with the following Class(below). After
build, I am able to reference the Class. See the TestClass in Object
Browser. But I can see the DoTest() method. I wasted hours and still
can't figure it out.
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using System;
using System.Collections.Generic;
using System.Text;

using System.Runtime.InteropServices;

namespace ComDllTest
{
   [Guid("701F1709-3B9F-4b2e-AF81-686D2C08F015")]
   public class TestClass
   {
       public TestClass()
       {
       }

       public void DoTest()
       {
           return;
       }

   }
}