I want to learn .net basically,

If you do have some previous experience of C# then, as well as the resources which Mahesh and Vilas have mentioned, there's also a very good printed book about the inner workings of .NET and the CLR:

For CLR 2.0 (http://www.amazon.com/CLR-via-Second-Pro-Developer/dp/0735621632)

For CLR 4.0 (http://www.amazon.com/CLR-via-C-Jeffrey-Richter/dp/0735627045/ref=dp_ob_title_bk)