Why all ptr 0?

Code (CSharp):

1. void Start() {
2. var texture = new Texture2D(0, 0, TextureFormat.ARGB32, false);
3.         Debug.Log($"texture: {texture.GetNativeTexturePtr()}");
4.         var texture2 = new Texture2D(0, 0, TextureFormat.ARGB32, false);
5.         Debug.Log($"texture2: {texture2.GetNativeTexturePtr()}");
6.         var texture3 = new Texture2D(0, 0, TextureFormat.ARGB32, false);
7.         Debug.Log($"texture3: {texture3.GetNativeTexturePtr()}");
8.         var texture4 = new Texture2D(0, 0, TextureFormat.ARGB32, false);
9.         Debug.Log($"texture4: {texture4.GetNativeTexturePtr()}");
10. }

Run console

Code (JavaScript):

1. texture: 0
2. texture2: 0
3. texture3: 0
4. texture4: 0
5.  

Why all texture ptr 0?
Do I need any other code to get the correct ptr?