It's faking amazing! The easy mocking framework for .NET that works great in C# and VB.NET alike. No need to know the difference between a stub, a mock or a spy, everything's a fake! The easy to use, refactoring friendly API makes faking a breeze.
The Visual Studio Testing Extensions is a library that exposes a set of extension methods to provide a way to write more readable unit tests in the Visual Studio Unit Testing environment. It is developed in C# 4.0 and requires the .NET 4.0 runtime.
Moq library with delegate mocks patch applied. See
for details and patch (by quetzalcoatl.pl AT gmail DOT com).
The simplest mocking library for .NET 3.5/4.0 and Silverlight with deep C# 3.0 integration.