Hi

The method is based on Method.
From MSDN
Returns the Assembly of the method that invoked the currently executing
method.

e.g.
Assembly StrongNameAssembly has a method GetString1,
        public string GetString1()
        {
            return Assembly.GetCallingAssembly().FullName;
        }
Assembly CommonClassLib has a method GetString1.
        public string GetString1()
        {
            return new StrongNameAssembly.TestClass().GetString1();
        }

When our App call
        private void button1_Click(object sender, System.EventArgs e)
        {
            CommonClassLib.TestClass o = new CommonClassLib.TestClass();
            MessageBox.Show(o.GetString1());
        }

Now I will get CommonClassLib, which follows the document.
You may have a try.

Best regards,

Peter Huang
Microsoft Online Partner Support