Released at the Microsoft Tech-Ed conference in Atlanta, Georgia, back in 2001, the first edition of this book coincided with the beta .NET platform and, in many ways, the manuscript was in beta too. Its fresh approach won a place as a 2002 Jolt Award finalist, and it won the 2003 Referenceware Excellence Award in the programming book category. Following the successful earlier editions, author Andrew Troelsen is pleased to announce completion of the fourth edition of his acclaimed book.