// Using Native Friend Picker Controller
		void FriendPicker ()
		{
			var friendController = new FBFriendPickerViewController () {
				Title = "Pick some friends"
			};

			friendController.LoadData ();
			friendController.PresentModallyFromViewController (this, true, (sender, donePressed) => {
				if (!donePressed) 
					InvokeOnMainThread (() => new UIAlertView ("Error", "User canceled.", null, "Ok", null).Show ());
				else {
					var ctrl = sender as FBFriendPickerViewController;
					foreach (var friend in ctrl.Selection)
						Console.WriteLine (friend.GetName ());
					InvokeOnMainThread (() => new UIAlertView ("Success", "You Picked " + ctrl.Selection.Count () + " friend(s)", null, "Ok", null).Show ());
				}
			});
		}
        // Pick Friends button handler
partial         void pickFriendsClick(NSObject sender)
        {
            Console.WriteLine("pickFriendsClick");
            FBFriendPickerViewController friendPickerController = new FBFriendPickerViewController();
            friendPickerController.Title = @"Pick Friends";
            friendPickerController.LoadData();
            friendPickerController.PresentModally(this, true, delegate(FBViewController sender2, bool donePressed) {
                if (!donePressed) {
                    return;
                }
                string message;

                if (friendPickerController.Selection.Count == 0)
                {
                    message = @"<No Friends Selected>";
                }
                else
                {
                    //string text = "";
                    StringBuilder text = new StringBuilder();
                    // we pick up the users from the selection, and create a string that we use to update the text view
                    // at the bottom of the display; note that self.selection is a property inherited from our base class
                    for (uint i = 0; i <  friendPickerController.Selection.Count; ++i)
                    {
                        if (text.Length > 0)
                        {
                            text.Append(@", ");
                        }

                        FBGraphObject user = (FBGraphObject)Runtime.GetNSObject(friendPickerController.Selection.ValueAt(i));

                        text.Append(user.ObjectForKey(new NSString("name")).ToString());
                    }
                    message = text.ToString();
                }

                UIAlertView alert = new UIAlertView("You Picked:", message, null, "Ok", null);
                alert.Show();
            });
        }