The Typemock Isolator developer tool is an add in for Visual Studio .NET ( 2005/2008) that simplifies unit testing by making a cleaner code and eliminating the need to refactor your code specifically for unit testing.This add in gives the developer tools to isolate, stub or mock any class in the system, such as sealed, abstract, and static classes or methods.The software installation supports .NET 2.0, 3.0 and 3.5 (C#, VB, VB.NET)