.NET - Validaciones de seguridad para el acceso a un fichero o dirección remota

Uri ruta = new Uri(rutaFichero + nombreFichero);

CredentialCache cache = new CredentialCache();
cache.Add(ruta, "NTLM", new NetworkCredential("usuario", "dominio", "pass"));

ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(AcceptAllCertifications);



 // to ignore SSL certificate errors

    public bool AcceptAllCertifications(object sender, System.Security.Cryptography.X509Certificates.X509Certificate certification, System.Security.Cryptography.X509Certificates.X509Chain chain, System.Net.Security.SslPolicyErrors sslPolicyErrors)
    {
        return true;
    }