private void InitializeIndex(NamedTileIndex index)
{
if (index == null)
throw new ArgumentNullException();
Index = index;
}
internal NamedTileKey(NamedTileIndex index, String name, Texture2dArea tile)
: base(tile)
{
//Inits moved here because parameters need to be passed.
InitializeIndex(index);
InitializeKey(name);
}