public void Union()
{
ZoneIdentityPermission a = new ZoneIdentityPermission(SecurityZone.Trusted);
ZoneIdentityPermission z = (ZoneIdentityPermission)a.Union(null);
Assert.IsTrue(Same(a, z), "Trusted+null");
Assert.IsFalse(Object.ReferenceEquals(a, z), "!ReferenceEquals1");
z = (ZoneIdentityPermission)a.Union(new ZoneIdentityPermission(PermissionState.None));
Assert.IsTrue(Same(a, z), "Trusted+PS.None");
Assert.IsFalse(Object.ReferenceEquals(a, z), "!ReferenceEquals2");
// note: can't be tested with PermissionState.Unrestricted
ZoneIdentityPermission n = new ZoneIdentityPermission(SecurityZone.NoZone);
z = (ZoneIdentityPermission)a.Union(n);
Assert.IsTrue(Same(a, z), "Trusted+NoZone");
Assert.IsFalse(Object.ReferenceEquals(a, z), "!ReferenceEquals3");
z = (ZoneIdentityPermission)n.Union(a);
Assert.IsTrue(Same(a, z), "NoZone+Trusted");
Assert.IsFalse(Object.ReferenceEquals(a, z), "!ReferenceEquals4");
}
public void Union_DifferentPermissions()
{
ZoneIdentityPermission a = new ZoneIdentityPermission(SecurityZone.Trusted);
SecurityPermission b = new SecurityPermission(PermissionState.None);
a.Union(b);
}
// </Snippet2>
// <Snippet3>
// Union creates a new permission that is the union of the current permission
// and the specified permission.
private static void UnionDemo()
{
ZoneIdentityPermission zoneIdPerm1 = new ZoneIdentityPermission(SecurityZone.Intranet);
ZoneIdentityPermission zoneIdPerm2 = new ZoneIdentityPermission(SecurityZone.MyComputer);
ZoneIdentityPermission p3 = (ZoneIdentityPermission)zoneIdPerm1.Union(zoneIdPerm2);
try
{
if (p3 != null)
{
Console.WriteLine("The union of " + zoneIdPerm1.SecurityZone.ToString() +
" and \n\t" + zoneIdPerm2.SecurityZone.ToString() + " is \n\t"
+ p3.SecurityZone.ToString() + "\n");
}
else
{
Console.WriteLine("The union of " + zoneIdPerm1.SecurityZone.ToString() +
" and \n\t" + zoneIdPerm2.SecurityZone.ToString() + " is null.\n");
}
}
catch (SystemException e)
{
Console.WriteLine("The union of " + zoneIdPerm1.SecurityZone.ToString() +
" and \n\t" + zoneIdPerm2.SecurityZone.ToString() + " failed.");
Console.WriteLine(e.Message);
}
}
public void Union_DifferentIdentities()
{
ZoneIdentityPermission a = new ZoneIdentityPermission(SecurityZone.Trusted);
ZoneIdentityPermission b = new ZoneIdentityPermission(SecurityZone.Untrusted);
IPermission result = a.Union(b);
Assert.IsNotNull(result, "Union");
// new XML format is used to contain more than one site
SecurityElement se = result.ToXml();
Assert.AreEqual(2, se.Children.Count, "Childs");
Assert.AreEqual(a.SecurityZone.ToString(), (se.Children [0] as SecurityElement).Attribute("Zone"), "Zone#1");
Assert.AreEqual(b.SecurityZone.ToString(), (se.Children [1] as SecurityElement).Attribute("Zone"), "Zone#2");
// strangely it is still versioned as 'version="1"'.
Assert.AreEqual("1", se.Attribute("version"), "Version");
}
