private void OnExit(object sender, FormClosingEventArgs e)
{
SaveChanges();
SceneData.CleanData();
Dispose();
}
/// <summary>
/// Close and clean data.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void OnClose(object sender, FormClosingEventArgs e)
{
SceneData.CleanData();
}