The reader is introduced to a business domain of a real-world Construction Administration application for an architecture firm. The application is ma critical, legacy MS Access application that has outgrown MS Access and is ready to become a full-fledged enterprise application. In each chapter, the relevant part of the domain is modeled out via diagrams and code. The application is built using C#, Windows Presentation Foundation, and other Microsoft technologies and best practices. The main focus of the book is on designing and implementing the domain model and all of the supporting patterns and framework that are built in support of the domain model.