public void FixtureSetUp ()
{
cert_empty = new X509Certificate2 ();
cert1 = new X509Certificate2 (X509Certificate2Test.farscape_pfx, "farscape", X509KeyStorageFlags.Exportable);
cert2 = new X509Certificate2 (Encoding.ASCII.GetBytes (X509Certificate2Test.base64_cert));
//empty = new X509Certificate2Collection ();
collection = new X509Certificate2Collection ();
collection.Add (cert1);
collection.Add (cert2);
}