New C# 4.0 Features

Parameters

• Optional


• Named


• Overload Resolution

Co- and Contravariance

• Covariance - same relationships


• Contracovariance - inverted relationships

dynamic

• run-time


• DLR - Dynamic Language Run-time

New Compiler Options

• Embedding COM Interop type information


• Specifying an app.config file to the C# compiler