在C#中获取本地公网IP地址

  public static string GetextenalIP()

    
  {
    
  //获取外部IP
    
  String url = "http://hijoyusers.joymeng.com:8100/test/getNameByOtherIp";
    
  string IP = "未获取到外网ip";
    
  try
    
  {
    
  //从网址中获取本机ip数据
    
  System.Net.WebClient client = new System.Net.WebClient();
    
  client.Encoding = System.Text.Encoding.Default;
    
  string str = client.DownloadString(url);
    
  client.Dispose();
    
  if (!str.Equals("")) IP = str;
    
  else IP = GetExtenalIpAddress_0();
    
  }
    
  catch (Ex