private void btnLogin_Click(object sender, EventArgs e) { // open the Facebook Login Dialog and ask for user permissions. var fbLoginDlg = new FacebookLoginDialog(AppId, ExtendedPermissions); fbLoginDlg.ShowDialog(); // The user has taken action, either allowed/denied or cancelled the authorization, // which can be known by looking at the dialogs FacebookOAuthResult property. // Depending on the result take appropriate actions. TakeLoggedInAction(fbLoginDlg.FacebookOAuthResult); }