The C# programming language combines the high productivity of rapid application development languages with the raw power of C and C++. This book covers the new features of C# 4.0, including dynamic binding, named and optional parameters, and covariant and contravariant generic types, which takes the language to the next level by adding the ability to cleanly write programs that don't rely on static type definitions. This allows dynamic programming languages such as Python, Ruby, and jаvascript to feel native to C#.