public void QuitBtnClick() { ConfirmDialog cw = SystemUI.Instance.WindowManager.CreateWindow <ConfirmDialog>(); cw.SetData("Are you sure you want to quit ?", (ConfirmDialog dialog, bool result) => { if (result) { Application.Quit(); #if UNITY_EDITOR EditorApplication.isPlaying = false; #endif } else { SystemUI.Instance.WindowManager.CloseTopWindow(); } }); SystemUI.Instance.WindowManager.OpenWindow(cw); }