/// <summary>

        /// 生成随机数字窜

        /// </summary>

        /// <param name="Digit">位数</param>

        /// <returns></returns>

        private string RandomNum(int Digit)

        {

            StringBuilder sb = new StringBuilder();

            Random random = new Random();

            int Nums = Digit;

            while (Nums > )

            {

                int i = random.Next(, );// 9>=a>=1

                if (sb.Length < Digit)

                {

                    sb.Append(i);

                }

                Nums -= ;

            }

            return sb.ToString();

        }