GUI don't render after WaitForEndOfFrame() render

Hello!

I have this:

Code (CSharp):

1.  
2. IEnumerator Capture() {
3.         yield return new WaitForEndOfFrame();
4.  
5.         RenderTexture rt = new RenderTexture(Screen.width, Screen.height, 24, RenderTextureFormat.ARGB32);
6.         Camera.main.targetTexture = rt;
7.  
8.         Camera.main.Render();
9.  
10.         RenderTexture.active = rt;
11.  
12.         Texture2D foo = new Texture2D(Screen.width, Screen.height, TextureFormat.ARGB32, false);
13.         foo.ReadPixels(new Rect(0, 0, Screen.width, Screen.height), 0, 0);
14.  
15.         Camera.main.targetTexture = null;
16.         RenderTexture.active = null;
17.         Destroy(rt);
18.     }

I want to see in result texture "foo" full scene: gameobjects & gui.
But I see only the gameobjects & gui, which I have placed to the scene in Editor (GUIText for example).
And I don't see any GUI, which created runtime in my OnGUI() methods.

What am I doing wrong?

Thanks!