how to logout SocialAuth in asp.net

how to logout SocialAuth in asp.net

pI am working on APS.NET website. now I am using SocialAuth library so not
able to logout thru ASP.NET. my code is like this./p ol lipApproach/p
pSocialAuthUser.GetCurrentUser().Logout(SocialAuthUser.CurrentProvider.ToString());
Response.Redirect(~/);/p/li lipApproach/p/li /ol pif
(SocialAuthUser.IsLoggedIn())
SocialAuthUser.GetCurrentUser().Logout(~/About.aspx);/p