List of .NET 2.0 and C# 2.0 new features

In his article List of .NET 2.0 and C# 2.0 new features, Patrick Smacchia gave short descriptions on .NET 2.0 and C# 2.0 new features. Here is an example (quoted from his article).

The use of the AssemblyKeyFile attribute to sign an assembly is to be avoided. It is now preferred that you use the /keycontainer and /keyfile options of csc.exe, or the new project properties of Visual Studio 2005.

I'll use his list to check if I do something that are not favorable to .NET 2.0 and C# 2.0.