facebook C# SDK - They are so many, which should I use

I initially saw this:开发者_高级运维 http://facebooksdk.codeplex.com/

but than found out https://github.com/facebook/csharp-sdk

now, which should I use?

I'm using the one on Codeplex. The one on github hasn't had any commits since July 2010. The codeplex one is also the recommended SDK by Microsoft.

There is also http://facesharp.codeplex.com/ which seems to take a different approach. Se discussion here http://facebooksdk.codeplex.com/discussions/247618.

I would use the offical micrsoft one.

http://msdn.microsoft.com/en-us/windows/ee388574.aspx as it come with good examples and is fairly easy to use. I am guessing you are using Visaul studio to develop? it comes with some tooling as well

found loads of good information here http://msdn.microsoft.com/en-us/windows/cc895481