public void Default () 
		{
			PublisherIdentityPermissionAttribute a = new PublisherIdentityPermissionAttribute (SecurityAction.Assert);
			Assert.IsNull (a.CertFile, "CertFile");
			Assert.IsNull (a.SignedFile, "SignedFile");
			Assert.IsNull (a.X509Certificate, "X509Certificate");
			Assert.AreEqual (a.ToString (), a.TypeId.ToString (), "TypeId");
			Assert.IsFalse (a.Unrestricted, "Unrestricted");

			PublisherIdentityPermission perm = (PublisherIdentityPermission) a.CreatePermission ();
			Assert.IsNull (perm.Certificate, "CreatePermission.Certificate");
		}