Как программно подключиться к SharePoint сайту с неправильным сертификатом. Обход ошибки: Could not establish trust relationship for the SSL/TLS secure channel.

Нашел решение здесь.
В кратце схема такая:

1. В программе создаем новый метод
   using System.Net;
   using System.Net.Security;
   using System.Security.Cryptography.X509Certificates;
   
   /// <summary>
   /// solution for exception
   /// System.Net.WebException:
   /// The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel. ---> System.Security.Authentication.AuthenticationException: The remote certificate is invalid according to the validation procedure.
   /// </summary>
   public static void BypassCertificateError()
   {
     ServicePointManager.ServerCertificateValidationCallback += delegate(Object sender1,X509Certificate certificate,X509Chain chain,SslPolicyErrors sslPolicyErrors)
   {
   return true;
   };
   }
2. Перед подключением к сайту вызываем этот метод:
   private void buttonStart_Click(object sender, EventArgs e)
   {
   string siteURL = "https://cms.flyuia.com/it";
   using (ClientContext siteCont = new ClientContext(siteURL))
   {
   siteCont.Credentials = System.Net.CredentialCache.DefaultCredentials;
   //Здесь свой код
   BypassCertificateError();
   siteCont.ExecuteQuery();
   }
   }