Unity : Take A picture at Run-time?

TakeSnapshot.cs

public static void TakeSnapshot(Camera cam, int resolution, string filename)
    {
        if (cam.targetTexture == null)
        {
            cam.targetTexture = new RenderTexture(resolution, resolution, 24);

        }

        Texture2D snapshoot = new Texture2D(resolution, resolution, TextureFormat.RGB24, false);
        cam.Render();
        RenderTexture.active = cam.targetTexture;
        snapshoot.ReadPixels(new Rect(0, 0, resolution, resolution), 0, 0);
        byte[] bytes = snapshoot.EncodeToPNG();
        string path = @"C:\Users\x\Desktop\x\" + filename;
        System.IO.File.WriteAllBytes(path, bytes);

    }
//NOTES
//Don’t use the main camera, create additional one and remove audio source component!
//