Hi Selvi, Please refer the below links http://www.codeproject.com/Articles/34125/Chapter-10-Object-Oriented-Programming-Polymorphis http://www.codeproject.com/Articles/22769/Introduction-to-Object-Oriented-Programming-Concep http://www.codeproject.com/Articles/219869/Object-Oriented-Programming-in-Csharp-NET http://www.c-sharpcorner.com/UploadFile/ecabral/OOPSandDotNET106252005024236AM/OOPSandDotNET1.aspx http://www.c-sharpcorner.com/UploadFile/ecabral/OOPSandDotNET206272005000559AM/OOPSandDotNET2.aspx Thanks

It should not be called "OOPS" with the "S". It is "OOP".

Answers

what is oops?