Validating SSL Certificate in .Net C#

.Net console application to get the site certificate to validate and show cert info.

using System;
using System.Net;
using System.Net.Security;
using System.Security.Cryptography.X509Certificates;
using System.Security;

namespace CertValidate
{
    class Program
    {
       
                
        static void Main(string[] args)
        {

            while (true) {

                Console.WriteLine("Enter Full URL");
               CheckSite(Console.ReadLine());
            }
        }


        public static void CheckSite(string URL) {

              
            HttpWebRequest request = WebRequest.CreateHttp(URL);
            request.ServerCertificateValidationCallback += ServerCertificateValidationCallback;
            using (HttpWebResponse response = (HttpWebResponse)request.GetResponse()) { }
            Console.WriteLine("End.");
             
        }

        private static bool ServerCertificateValidationCallback(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
        {

            if (sslPolicyErrors == SslPolicyErrors.None)
            {
                Console.WriteLine("Certificate OK");
                Console.WriteLine(certificate.ToString());
                return true;
            }
            else
            {
                Console.WriteLine("Certificate ERROR");
                return false;
            }
        }

    }

}