Gallio provides a unit test framework, console test runner, GUI test runner and so much more. It's quite featureful. There's even a book.

Gallio subsumes the MbUnit framework which is included with it.

The project home page is at http://gallio.org/

Feel free to add tips to this page about using Gallio and MbUnit.

Tips:

 * Give a project Foo, create a sibling directory Foo.Test to contain your tests.
 * Reference MbUnit and Gallio assemblies.

See also: [wiki:NUnitFramework], LibraryTopics