using System;

using System.Net;

public class Program

{

    public static void Main()

    {

        ServicePointManager.Expect100Continue = true;

        ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;

        WebClient client = new WebClient();

        string s = client.DownloadString("https://physics.nist.gov/cgi-bin/cuu/CCValue?mal|ShowSecond=Browse&First=malc2");

        Console.WriteLine(s);

    }

}