Unit Test Patterns for .NET development

Unit Test Patterns for .NET development - Part I - .NET Unit tests Framework
Excellent article (or a series of articles) on Unit Testing for .Net development. This article focuses on Test Patterns:

• 4 Stage Testing Pattern
• Test Exception Pattern
• Inner Class Test Pattern
• Reflection Test Pattern
• Mock Object Pattern

The other articles in the series focus a bit more on mock objects and their usage in unit testing.