internal void ShowDifficultySwitch(bool reference = false)
{
if (openDialog != null && !openDialog.IsDisposed && openDialog.Visible)
{
openDialog.Focus();
return;
}
openDialog = new OpenDialog(reference);
openDialog.Location = new System.Drawing.Point(GameBase.Form.Location.X + 10, GameBase.Form.Location.Y + 55);
openDialog.Show(GameBase.Form);
}