如何自动获取IP地址

最近自己用C#窗体做了个登录页面，需要连接数据库，在自己和别人的电脑上都能完美运行，但就是有一点，需要我自己去更换我的IP地址，非常的麻烦。
能不能用代码让程序自动获取我的IP地址

第一种 取本主机ip地址

       public string GetLocalIp()
        {undefined
            ///获取本地的IP地址
            string AddressIP = string.Empty;
            foreach (IPAddress _IPAddress in Dns.GetHostEntry(Dns.GetHostName()).AddressList)
            {undefined
                if (_IPAddress.AddressFamily.ToString() == "InterNetwork")
                {undefined
                    AddressIP = _IPAddress.ToString();
                }
            }
            return AddressIP;
        }
```C#
第二种     

    /// <summary>
    /// 取本机主机ip
    /// </summary>
    /// <returns></returns>
    public static string GetLocalIP()
    {undefined
        try
        {undefined
            
            string HostName = Dns.GetHostName(); //得到主机名
            IPHostEntry IpEntry = Dns.GetHostEntry(HostName);
            for (int i = 0; i < IpEntry.AddressList.Length; i++)
            {undefined
                //从IP地址列表中筛选出IPv4类型的IP地址
                //AddressFamily.InterNetwork表示此IP为IPv4,
                //AddressFamily.InterNetworkV6表示此地址为IPv6类型
                if (IpEntry.AddressList[i].AddressFamily == AddressFamily.InterNetwork)
                {undefined
                    string ip = "";
                    ip = IpEntry.AddressList[i].ToString();
                    return IpEntry.AddressList[i].ToString();
                }
            }
            return "";
        }
        catch (Exception ex)
        {undefined
            return ex.Message;
        }
    }

第三种 通过访问的网址来取IP

    public static string GetIP()
    {undefined
        using (var webClient = new WebClient())
        {undefined
            try
            {undefined
                var temp = webClient.DownloadString("http://localhost:1234/WeatherWebForm.aspx");//一般指定网址
                var ip = Regex.Match(temp, @"\[(?<ip>\d+\.\d+\.\d+\.\d+)]").Groups["ip"].Value;
                return !string.IsNullOrEmpty(ip) ? ip : null;
            }
            catch (Exception ex)
            {undefined
                return ex.Message;
            }
        }
    }

```C#