Create Windows Forms Control using Reflection
See the question and my original answer on StackOverflowYou can specify the full name of the assembly (as this one is in the GAC), like this (it will also get back the good assembly even in framework 4):
Type.GetType("System.Windows.Forms.TextBox, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089");