public void PermissionStateNone ()
{
PrincipalPermission p = new PrincipalPermission (PermissionState.None);
AssertNotNull ("PrincipalPermission(PermissionState.None)", p);
Assert ("IsUnrestricted", !p.IsUnrestricted ());
PrincipalPermission copy = (PrincipalPermission) p.Copy ();
AssertEquals ("Copy.IsUnrestricted", p.IsUnrestricted (), copy.IsUnrestricted ());
SecurityElement se = p.ToXml ();
Assert ("ToXml-class", (se.Attributes ["class"] as string).StartsWith (className));
AssertEquals ("ToXml-version", "1", (se.Attributes ["version"] as string));
}