How to integrate facebook, or linked-In details in my webfrom

I have one query,like this

i have several field as same as given in profile of facebook or linked-In (profile pic,Full Details of users,job title,work expereince,city etc.)

so ,i want to integrate in my web-form as i take same filed in my .aspx file,i use linq for retrive records ,so how i fetch this details from my facebook or linked-In account

Thanks in advance.

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Thanks&Regards
ketan