What is the Microsoft .Net Framework?
 

Eh? I couldn't find much about it on MS's website..

.NET as you probably already know includes several different .NET languages (J#, C#, C++ .NET, VB .NET, and many others). What the .NET Framework does is takes that language and compiles the code to byte code that is the same, so the languages can intermingle.

there are many other advantages to this, but since your question was rather broad I figured just this bit would probably suffice.

if you wish to make your question a little more specific I can attempt to answer it. I have been programming .NET applications for over a year now, but almost exclusively C#.

google, Google, GOOGLE! hehehe I put your question into google, and looky look at the 1st link that appeared:

http://www.microsoft.com/net/

from the looks of it, there's a plethora of info on that site about what .net is and how it works. :)