public void GetHashCode_ ()
{
PermissionSet ps = new PermissionSet (PermissionState.None);
Assert.AreEqual (0, ps.GetHashCode (), "Empty");
SecurityPermission sp = new SecurityPermission (SecurityPermissionFlag.Assertion);
ps.AddPermission (sp);
Assert.IsTrue (ps.GetHashCode () != 0, "SecurityPermission");
PermissionSet copy = ps.Copy ();
Assert.IsTrue (ps.GetHashCode () != copy.GetHashCode (), "Copy");
}