Hi Aarti,
I can suggest you one way to achieve your requirement upto some extent. There is a concept like
URL REWRITING. Using this concept you can able to achieve some portion of your requirement. You can able to mask some of the portions of the URL like querystring and can achieve the goal you are trying to do. Here is a very god URL which will help you understanding in depth follow below.
url-rewriting-with-asp-net
Hopw this will help you to achieve your goal.
Thanks & Regards
Sisir Patro