google/facebook/live id authentication using c# for windows phone?
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i have a loginid and password textbox where user can login using gmail/facebook/live id.

Whenever user logins through facebook/gmail/live id it should validate agaianst specific webbroser in same page itself.

It should not redirect user to facebook/gmail/live id web page.

I just need to validate user credentials when user login to apps.

i am doing this for wp7.1 mango using c#

please reply as soon