Utility

        #region Tools
        public static string ForMatDateTime(DateTime dt, string formatStr)
        {
            return string.Format("{0:" + formatStr + "}", dt);
        }

        //补0
        public static string PadLeft(string values, int count)
        {
            return values.PadLeft(count, '0');
        }
        #endregion

Utils.ForMatDateTime(DateTime.Now, "yyyyMMddHHmmssffff");