Use StreamingAssets in Unity

StreamingAssetsSample.cs

private IEnumerator CopyVersion()
{
    string _Version_txt_streamingAssetsPath = PathConf.VCRoot + "Version.txt";
    if (_Version_txt_streamingAssetsPath.Contains("://"))
    {
        using (WWW www = new WWW(_Version_txt_streamingAssetsPath))
        {
            yield return www;
            if (!string.IsNullOrEmpty(www.error))
            {
                yield return null;
                StartCoroutine(CopyVersion());
                yield break;
            }
            File.WriteAllBytes(m_Version_txt_Path, www.bytes);
        }
    }
    else
    {
        File.Copy(_Version_txt_streamingAssetsPath, m_Version_txt_Path, true);
    }
}