Change user Agent for Browser Information for webrequest using c#.net

[TejasMehta]

Hello all,
I m creating one window application for sending request to URL and getting response from there by http webrequest.Here i want to modify user agent string to change the browser information on request send by web request. but i am not getting any guidence about how to modify user agent string in c#.net.

Please give any help....Thank You.