Written by leading authors C # 4.0 in a short (? O Reilly), this book covers the entire C # 4.0 language - without skimping on the details - including: new to C # 4.0, such as the binding parameters, optional and named dynamic features, and the variance parameter of type All C # 's fundamental Advanced topics, including operator overloading, custom conversion, constraint type, covariance and contravariance, lambda expressions and cover, iterator , nullable types, and operators lifting LINQ, starting with the order, the implementation of lazy, and the standard query operators, finishing with a complete reference to query expression of unsafe code and pointers, custom attributes, preprocessor directives, and XML documentation