[C#][Net] 取得client Ip位置

	public class NetWorkHelper
	{
	public static string GetPublicIP()
	{
	String direction = "";
	WebRequest request = WebRequest.Create("http://checkip.dyndns.org/");
	using (WebResponse response = request.GetResponse())
	using (StreamReader stream = new StreamReader(response.GetResponseStream()))
	{
	direction = stream.ReadToEnd();
	}
	//Search for the ip in the html
	int first = direction.IndexOf("Address: ") + 9;
	int last = direction.LastIndexOf("</body>");
	direction = direction.Substring(first, last - first);
	return direction;
	}
	}

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