Using Facebook as single signon

I am developing an mvc.net application and would like to use Facebook Connect as single signon, but do I need to create a Facebook application from within their interface, or can I use the login features without creating an 开发者_StackOverflowapplication?

It is required that you register your application through Facebook even just for doing single sign-on. This is mentioned in their instructuctions.

"The JavaScript SDK requires that you register your application with Facebook to get an app id for your site."

I do know that it is required if you are doing any server-side work as well.