private void GameForm_FormClosing(object sender, FormClosingEventArgs e)
{
timer.Stop();
ClientEngine.StopGame();
ClientEngine.OnMapChanged -= OnMapChangeHandler;
ClientEngine.OnTankDeath -= OnTankDeath;
ClientEngine.OnError -= ErrorHandler;
onMapChanged -= onMapChangedProc;
DeathAnimation -= onDeathAnimation;
ClientEngine.onGameStart -= OnGameStart;
ClientEngine.onDeath -= onDeath;
ClientEngine.onEndGame -= OnEndGame;
ClientEngine = null;
Map = null;
}