@ ramesh.radam

msdn is very, very often one of the best places to search for c# and .NET concepts ... often you'll find examples in c# and other languages.

http://lmgtfy.com/?q=site%3Amsdn.microsoft.com+oop+c%23+examples+concepts

returns

http://msdn.microsoft.com/en-us/library/dd460654.aspx
"Object-Oriented Programming (C# and Visual Basic)"

http://msdn.microsoft.com/en-us/library/ms173149.aspx vs2010: "Inheritance (C# Programming Guide)"

2001 article:
http://msdn.microsoft.com/en-us/magazine/cc301852.aspx
"Design Patterns: Solidify Your C# Application Architecture with Design Patterns"

also worth studying:
http://msdn.microsoft.com/en-us/library/dd460655.aspx vs2010: "Programming Concepts"

http://msdn.microsoft.com/en-us/library/z1zx9t92.aspx vs2010:
"Introduction to the C# Language and the .NET Framework"

MORE  INFORMATION

imho, dotnetperls is an excellent site with many fine examples:

http://www.dotnetperls.com/inheritance

stackoverflow.com is also fantasitic ... the top contributor to stackoverflow is c# guru Jon Skeet.

ACM:  For US$99 per year, you can get access to hundreds of current and useful computer books plus online training:  http://learning.acm.org/index.cfm (ACM is the world's largest association for computer professionals).

g.