public void Dispose()
{
int idx = Pyramid.FindMyPosition(this);
instances[idx] = null; // available slot
// throw new NotImplementedException();
}
public static Pyramid Build()
{
if (_SingleInstance == null)
{
_SingleInstance = new Pyramid();
}
return(_SingleInstance);
}
private static int FindMyPosition(Pyramid pyramid)
{
for (int i = 0; i < instances.Count; i++)
{
if (instances[i] == pyramid)
{
return(i);
}
}
return(-1); // never~~~
}
