Creating Facebook Application in asp.net

I want to create a Facebook IFRAME applicaton with asp.net. I just want to know should I need to host the application some where over internet? If yes, how could I test my application on localhost?

Update:

I just want a simple app for displaying a user name with "Hello." Can anyone show me the code for that with the complete web.config configuration?

I'm trying this code

using facebook.web; namespace TestFbApplication { public partial class _Default:facebook.web.CanvasFBMLBasePage {

 facebook.Components.FacebookService _fbService = new facebook.Components.FacebookService();
 private const string FACEBOOK_APPKEY = "66a8278bb94d969247a80815bab686e5";  // From the Facebook application page
 private const string FACEBOOK_SECRET = "de76280e4ddaef72ac2166afe开发者_StackOverflow中文版7ffb9d5";  // From the Facebook application page
    protected void Page_PreInit(object sender, EventArgs e)
    {
        base.RequireLogin = false;

        _fbService.IsDesktopApplication = false;

        _fbService.ApplicationKey = FACEBOOK_APPKEY;
        _fbService.Secret = FACEBOOK_SECRET;

        _fbService.IsDesktopApplication = false;
        _fbService.ConnectToFacebook();

        abc.InnerText = _fbService.users.getInfo().ToString();

    }

and it is throwing and Exception in the last line that that the object reference is not set.

You will need to host your production application somewhere, but you can test locally. If you set your Canvas URL to http://localhost:81 in Facebook, this should work. It did for me a couple of months ago, but they may have changed it since then.

this might be an interesting for you: http://www.stevetrefethen.com/blog/DevelopingFacebookapplicationsinCwithASPNET.aspx