C# history

Since the C# language was introduced, it has been evolving. The other day, I was thinking how different it has become, so to make it more accurate, I downloaded the specification files from microsoft website and other resources. Here is a short list of the changes after C# 2.0 was introduced:

New features added to C# 2.0	Generics Anonymous methods Iterators Partial types Nullable types
New features added to C# 3.0	Implicitly typed local variables Lambda expressions Object and collection initializers Anonymous types Implicitly typed arrays Query expressions Expression trees
New features added to C# 4.0	Dynamic binding Named and optional arguments COM interoperability Covariance and Contravariance

I don't think the list is complete. So if you think there is something wrong or you could add an item to it, let me know.