private void Initialize()
{
if (timer != null)
{
timer.Dispose();
}
GameState = GameState.Default;
Rows = Resolver.CreateNewRows(Size, MimeRate);
var observable = Observable.Timer(TimeSpan.FromSeconds(0), TimeSpan.FromSeconds(1));
timer = observable.ObserveOn(SynchronizationContext.Current).Subscribe(v => ElapsedTime = Convert.ToInt32(v));
}