private void Window_KeyUp(object sender, KeyEventArgs e)
{
if (e.Key == Key.A || e.Key == Key.Left)
{
board.MoveToLeft();
}
if (e.Key == Key.D || e.Key == Key.Right)
{
board.MoveToRight();
}
if (e.Key == Key.W || e.Key == Key.Up)
{
board.Rotate();
}
if (e.Key == Key.S || e.Key == Key.Down)
{
board.FastDown();
}
}