Some very bad 'legacy' code to use as practise

A URI building helper library for ASP.NET Web API

AutoFixture is an open source library for .NET designed to minimize the 'Arrange' phase of your unit tests in order to maximize maintainability. Its primary goal is to allow developers to focus on …

Microsoft patterns & pratices CQRS Journey sample application

Castle Windsor is a best of breed, mature Inversion of Control container available for .NET

Castle Core, including Castle DynamicProxy, Logging Services and DictionaryAdapter

Demo code demonstrating how to manage a complex code base with DI, Convention over Configuration, etc.

Demo code accompanying the CQRS on Azure MSDN Magazine article