The XNA Game Studio 2.0 documentation contains information on how to use supported versions of Microsoft Visual Studio tools with the XNA Framework to develop games for Microsoft platforms. The documentation provides a reference to the classes exposed by the XNA Framework and includes How To information for common development tasks. The documentation also describes the ways in which XNA Game Studio extends the Microsoft Visual Studio development environment.
The XNA Framework is intended to complement the .NET Framework. Therefore, the XNA Framework documentation links into the .NET Framework documentation. Similarly, XNA Game Studio takes advantage of the Microsoft Visual Studio integrated development environment (IDE). Therefore, you will need the documentation for supported versions of Microsoft Visual Studio tools as well.