RegEx for an IP Address

Question

I try to extract the value (IP Address) of the wan_ip with this sourcecode: Whats wrong?! I´m sure that the RegEx pattern is correct.

String input = @\"var p         


        

Answer 1

If you just want check correct IP use IPAddress.TryParse

using System.Net;

bool isIP(string host)
{
    IPAddress ip;
    return IPAddress.TryParse(host, out ip);
}