System.Security.Permissions.ZoneIdentityPermission.Union C# (CSharp) Method

        public override IPermission Union(IPermission target)
        {
            return default(IPermission);
        }

		public void Union_DifferentIdentities ()
		{
			ZoneIdentityPermission a = new ZoneIdentityPermission (SecurityZone.Trusted);
			ZoneIdentityPermission b = new ZoneIdentityPermission (SecurityZone.Untrusted);
			IPermission result = a.Union (b);
#if NET_2_0
			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");
#else
			Assert.IsNull (result);
#endif
		}