参考

1. facebook and google加上登录asp.net [ ^ ]

2. DotNetOpenAuth.AspNet Twitter，Facebook ，Google，Microsoft，LinkedIn身份验证 [ ^ ]

I am developing my own website. I added 3 buttons for login with facebook twitter g+.
How to add login page of each site on click event of button?
And after successful login how to save email id in my mssql database?

Refer
1. facebook and google plus login in asp.net[^]
2. DotNetOpenAuth.AspNet Twitter,Facebook,Google,Microsoft,LinkedIn Authentication[^]