How to login into website using facebook account in asp.net and visual studio 2010

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C#3.5

Hi,

My name is Guru,

I am facing problem in logging in into my website, i have used javascript sdk from facebok account and appid , when click on facebook button it opens facebook login dialogue box when i provide credentials i logs me into facebok i.e button changes to logout but stays in the same page but i want it to log me in into My site..i am not getting how to code for logging in into my site .. whether i code in server side in asp.net or in the same page or i should do some settings in visual studio 2010..what shall i do..i have secret key where to use it how can i make facebook username as my application username so that i can start my user session..