Smart way to get the public Internet IP address/geo loc

Question

I have a computer on the local network, behind a NAT router. I have some 192.168.0.x addresses, but I really want to know my public IP address, not something mentioned in

How to get the IP address of the server on which my C# application is running on?

or

How to get the IP address of a machine in C#

I need C# code.

Is it possible? If so, how?

Answer 1

After some search, and by expanding my requirements, I found out that this will get me not only the IP, but GEO-location as well:

class GeoIp
{
    static public GeoIpData GetMy()
    {
        string url = "http://freegeoip.net/xml/";
        WebClient wc = new WebClient();
        wc.Proxy = null;
        MemoryStream ms = new MemoryStream(wc.DownloadData(url));
        XmlTextReader rdr = new XmlTextReader(url);
        XmlDocument doc = new XmlDocument();
        ms.Position = 0;
        doc.Load(ms);
        ms.Dispose();
        GeoIpData retval = new GeoIpData();
        foreach (XmlElement el in doc.ChildNodes[1].ChildNodes)
        {
            retval.KeyValue.Add(el.Name, el.InnerText);
        }
        return retval;
    }
}

XML returned, and thus key/value dictionary will be filled as such:

<Response>
    <Ip>93.139.127.187</Ip>
    <CountryCode>HR</CountryCode>
    <CountryName>Croatia</CountryName>
    <RegionCode>16</RegionCode>
    <RegionName>Varazdinska</RegionName>
    <City>Varazdinske Toplice</City>
    <ZipCode/>
    <Latitude>46.2092</Latitude>
    <Longitude>16.4192</Longitude>
    <MetroCode/>
</Response>

And for convenience, return class:

class GeoIpData
{
    public GeoIpData()
    {
        KeyValue = new Dictionary<string, string>();
    }
    public Dictionary<string, string> KeyValue;
}