partial void _MenuOpenClick(MonoMac.Foundation.NSObject sender) { var openPanel = new NSOpenPanel(); openPanel.ReleasedWhenClosed = true; openPanel.Prompt = "Select DEX file"; openPanel.CanChooseDirectories = false; openPanel.AllowedFileTypes = new string[] { "apk", "dex" }; var result = openPanel.RunModal(); if (result == 1) { MainWindowController windowController = null; try { windowController = new MainWindowController(); windowController.OpenDex(openPanel.Url.Path); windowController.Window.MakeKeyAndOrderFront(this); } catch (Exception e) { Console.WriteLine(e); // Show error message to the user var alert = new NSAlert { MessageText = e.Message, AlertStyle = NSAlertStyle.Critical }; alert.AddButton("OK"); alert.RunModal(); if (windowController != null) { windowController.Close(); windowController.Dispose(); } } } }