标签：http io os sp on log ef bs as
http://www.asp.net/web-pages/overview/security/enabling-login-from-external-sites-in-an-aspnet-web-pages-site
http://www.asp.net/web-api/overview/security/external-authentication-services
三方控件的登陆和注销--Facebook,Google,Microsoft,Twitter etc.
原文地址：http://www.cnblogs.com/songxia/p/4026433.html
