Qiniu.Util.Mac.Sign C# (CSharp) Method

        public string Sign(byte[] data)
        {
            return string.Format("{0}:{1}", this.AccessKey, this._sign(data));
        }

 public static string createDownloadToken(string rawUrl, Mac mac)
 {
     return(mac.Sign(Encoding.UTF8.GetBytes(rawUrl)));
 }