You could try the code that is built as part of the .NET Domain-Driven Design with C#: Problem - Design - Solution book.
The code is freely available from Codeplex here and also on the book's website, and is a fairly feature complete application demonstrating DDD with C#.
From the codeplex site:
The book is one large case study of a real-world application, named SmartCA, which is a smart client application implemented with the latest .NET technologies and following DDD principles.
