MVC Central

http://www.mvccentral.net/

Interfaces in C#

http://www.codeguru.com/csharp/csharp/cs_syntax/interfaces/article.php/c7563/Interfaces-in-C.htm

Diamond problem

http://en.wikipedia.org/wiki/Diamond_problem

Why multiple Inheritance is not possible in C#?

http://www.geekinterview.com/question_details/27160

Explaining C# Abstraction, Inheritence and Polymorphism

http://www.csharphelp.com/2007/08/explaining-c-abstraction-inheritence-and-polymorphism/

OOPS Concepts and .NET Part 2:

http://www.c-sharpcorner.com/uploadfile/eecabral/oopsand.net211102005075520am/oopsand.net2.aspx

http://www.c-sharpcorner.com/UploadFile/ecabral/OOPSandDotNET106252005024236AM/OOPSandDotNET1.aspx

Forums of Different Languages

http://forums.asp.net/p/1337412/2699239.aspx#2699239 and my blog at http://geekswithblogs.net/TATWORTH/Default.aspx