public string GetLocalIP()

    {

        IPAddress localIp = null;

        try

        {

            IPAddress[] ipArray;

            ipArray = Dns.GetHostAddresses(Dns.GetHostName());

            localIp = ipArray.First(ip => ip.AddressFamily == AddressFamily.InterNetwork);

        }

        catch (Exception ex)

        {

            MessageBox.Show(ex.StackTrace + "\r\n" + ex.Message, "错误", MessageBoxButtons.OKCancel, MessageBoxIcon.Error);

            Log.WriteLog(ex);

        }

        if (localIp == null)

        {

            localIp = IPAddress.Parse("127.0.0.1");

        }

        return localIp.ToString();

    }