get client IP details

string hostIPAdd = null;
        string hostName = null;
        string clientIP = null;
        string clientGateWay = null;
        string strDNS = null;
        string strHostName = System.Net.Dns.GetHostName();

        hostIPAdd = this.Page.Request.ServerVariables["REMOTE_ADDR"].ToString();
        hostName = HttpContext.Current.Request.UserHostName;
        clientIP = System.Net.Dns.GetHostByName(strHostName).AddressList.GetValue(0).ToString();
        NetworkInterface[] adapters = NetworkInterface.GetAllNetworkInterfaces();
        foreach (NetworkInterface adapter in adapters)
        {
            IPInterfaceProperties adaProperties = adapter.GetIPProperties();
            GatewayIPAddressInformationCollection add = adaProperties.GatewayAddresses;
            if (add.Count > 0)
            {
                foreach (GatewayIPAddressInformation address in add)
                {
                    clientGateWay += address.Address.ToString();
                }
            }
            IPAddressCollection cip = adapter.GetIPProperties().DnsAddresses;
            foreach (System.Net.IPAddress ip in ip)
            {
               strDNS = cip.ToString();
            }
        }