C# extract ip address from url

using System.Text.RegularExpressions; 
 static void ExtractIpDemo()
        {
            string url = "192.125.35.48\d\subfolder\bsubfolder\cfolder\d.txt";
            string ipValue = ExtractIPAddressFromUrl(url);
            Console.WriteLine(ipValue);
        }

        static string ExtractIPAddressFromUrl(string remoteAddress)
        {
            string ipHost = string.Empty;
            var match = Regex.Match(remoteAddress, @"(d{1,3}.d{1,3}.d{1,3}.d{1,3})");
            if (match.Success)
            {
                ipHost = match.Captures[0].Value; 
            }
            return ipHost;
        }