Looking at generics (aka template classes) in 2.0 beta, here are some differences between C# generics and C++ templates.

• can't call arithmetic operators in a C# generic class. You CAN call user defined operators
  
• C# does not support explicit or partial specialization (i.e. custom implementation for a specific type)
  
• C# does not allow the type parameter to be used as the base class for the generic type (ala ATL)