自动拨号及断线重拨

using System;
using 发送与接收IP;
using Microsoft.VisualBasic;

namespace AutoDial
{
    public class Connect
    {
        int int_拨号进程ID;
        static string string_拨号程序及参数="C:\\winnt\\system32\\rasphone.exe -d \"adsl\"";
        static string string_挂断连接="C:\\winnt\\system32\\rasphone.exe -h \"adsl\"";
        static string string_拨号进程名="rasphone";
        static int int_重拨时间间隔=-1;
        public Connect()
        {
        }
        private bool 在线()
        {
            //有公网IP即为在线，没有公网IP为不在线
            bool bool_在线;
            string string_本机IP=发送与接收IP.class_发送IP.获取本机公网IP地址 ();
            if (string_本机IP==null)
            {
                bool_在线=false;
            }
            else
            {
                bool_在线=true;
            }
            return bool_在线;
        }
        private bool 连接稳定()
        {
            try
            {
                System.Net .IPHostEntry IPHostEntry_天极网IP=System.Net .Dns .GetHostByName("www.yesky.com");
                return true;
            }
            catch (System.Exception er)
            {
                return false;//连接不稳定
            }

        }
        private void 启动拨号连接()
        {
            int_拨号进程ID = Microsoft.VisualBasic.Interaction.Shell(string_拨号程序及参数,AppWinStyle.MinimizedNoFocus ,true,int_重拨时间间隔);
        }
        private void 终止拨号进程()
        {
            System.Diagnostics .Process[] arrayProcess_计算机全部进程;
            arrayProcess_计算机全部进程 =System.Diagnostics . Process.GetProcessesByName(string_拨号进程名);
            foreach(System.Diagnostics .Process Process_单个进程 in arrayProcess_计算机全部进程)
            {
                Process_单个进程.Kill ();
            }
        }
        private void 挂断连接()
        {
            int_拨号进程ID = Microsoft.VisualBasic.Interaction.Shell(string_挂断连接,AppWinStyle.MinimizedNoFocus ,true,int_重拨时间间隔);
        }
        public void 保持在线()
        {
            if (在线())
            {
                if (连接稳定())
                {
                    return ;
                }
                else
                {
                    挂断连接();
                    终止拨号进程();
                    启动拨号连接();
                }
            }
            else
            {
                挂断连接();
                终止拨号进程();
                启动拨号连接();
            }
        }

    }
}