public string push = "sdcard/DCIM/camera";

public void ButtonScreenShot()
{
StartCoroutine("ScreenShotEncode");
Debug.Log("!!!!");
}

IEnumerator ScreenShotEncode()
{
yield return new WaitForEndOfFrame();
string datacion = System.DateTime.Now.ToFileTime().ToString();
Application.CaptureScreenshot(push + datacion + ".png");

}