Artemis.Engine.Graphics.SpriteSheet.this C# (CSharp) Method

        public Tile this[string key]
        {
            get
            {
                if (key.Contains(UriUtilities.URI_SEPARATOR))
                {
                    var parts = key.Split(UriUtilities.URI_SEPARATOR);
                    return TileGroups[parts[0]][parts[1]];
                }
                else
                {
                    return GlobalTileGroup[key];
                }
            }
        }