/// <summary>

        /// 正规则试验IP地址

        /// </summary>

        /// <param name="IP"></param>

        /// <returns></returns>

        public bool IPCheck(string IP)

        {

            string num = "(25[0-5]|2[0-4]\\d|[0-1]\\d{2}|[1-9]?\\d)";

            return Regex.IsMatch(IP, ("^" + num + "\\." + num + "\\." + num + "\\." + num + "[        DISCUZ_CODE_0        ]quot;));

        }

        private void Form1_FormClosed(object sender, FormClosedEventArgs e)

        {

            System.Environment.Exit();

        }

        #region ip转换

        /// <summary>

        /// ip转成long

        /// </summary>

        /// <param name="ip"></param>

        /// <returns></returns>

        public static long IpToInt(string ip)

        {

            char[] separator = new char[] { '.' };

            string[] items = ip.Split(separator);

            return long.Parse(items[]) <<

                    | long.Parse(items[]) <<

                    | long.Parse(items[]) <<

                    | long.Parse(items[]);

        }

        /// <summary>

        /// long转成ip

        /// </summary>

        /// <param name="ipInt"></param>

        /// <returns></returns>

        public static string IntToIp(long ipInt)

        {

            StringBuilder sb = new StringBuilder();

            sb.Append((ipInt >> ) & 0xFF).Append(".");

            sb.Append((ipInt >> ) & 0xFF).Append(".");

            sb.Append((ipInt >> ) & 0xFF).Append(".");

            sb.Append(ipInt & 0xFF);

            return sb.ToString();

        }

        #endregion