Creat sprites map by script.

I have .psd file as Sprite2D/Multiple. I want to creat sprites map by script.

Code (CSharp):

1. Texture2D testTexture =  Resources.Load<Texture2D>("TILES_000");
2.             Sprite MySprite = Sprite.Create(testTexture, new Rect(0, 20, 40, 40), new Vector2(0, 0), 500);
3.             GameObject _gameObject2 = new GameObject("test2");
4.             _gameObject2.AddComponent<SpriteRenderer>();
5.             _gameObject2.GetComponent<Transform>().position = new Vector2(1, 1);
6.             _gameObject2.GetComponent<SpriteRenderer>().sprite = MySprite;

... and field sprite is empty