Windows Phone 7: Getting ready

In this post I'll cover the first steps needed to be done, towards developing windows-phone-7 apps and games.
Bottom up:

1. Framework -
   The basic layer of the Windows Phone 7 is the special .NET framework.
   I'm talking about the new .NET XNA framework.
   The XNA framework is a set of tools with a managed runtime environment provided by Microsoft that facilitates computer game development(especially the XBOX) and management.
   With the latest .NET 4 framework we can now write our own apps libraries and services for Windows Phone 7.