System.Net.Mail.SmtpPermission.Union C# (CSharp) Method

        public override IPermission Union(IPermission target)
        {
            if (target == null)
            {
                return Copy();
            }
            SmtpPermission other = target as SmtpPermission;
            if (other == null)
            {
                throw new ArgumentException(SR.Format(SR.net_perm_target), nameof(target));
            }

            if (_unrestricted || other.IsUnrestricted())
            {
                return new SmtpPermission(true);
            }

            return new SmtpPermission(_access > other._access ? _access : other._access);
        }

		public void Union_SmtpAccess ()
		{
			SmtpPermission spn = new SmtpPermission (false);
			SmtpPermission spu = new SmtpPermission (true);
			SmtpPermission spctup = new SmtpPermission (SmtpAccess.ConnectToUnrestrictedPort);
			SmtpPermission spconnect = new SmtpPermission (SmtpAccess.Connect);
			SmtpPermission spnone = new SmtpPermission (SmtpAccess.None);

			SmtpPermission union = (SmtpPermission) spn.Union (spctup);
			Assert.AreEqual (SmtpAccess.ConnectToUnrestrictedPort, union.Access, "None U ConnectToUnrestrictedPort");
			union = (SmtpPermission) spn.Union (spconnect);
			Assert.AreEqual (SmtpAccess.Connect, union.Access, "None U Connect");
			union = (SmtpPermission) spn.Union (spnone);
			Assert.AreEqual (SmtpAccess.None, union.Access, "None U SmtpAccess.None");

			union = (SmtpPermission) spu.Union (spctup);
			Assert.AreEqual (SmtpAccess.ConnectToUnrestrictedPort, union.Access, "Unrestricted U ConnectToUnrestrictedPort");
			union = (SmtpPermission) spu.Union (spconnect);
			Assert.AreEqual (SmtpAccess.ConnectToUnrestrictedPort, union.Access, "Unrestricted U Connect");
			union = (SmtpPermission) spu.Union (spnone);
			Assert.AreEqual (SmtpAccess.ConnectToUnrestrictedPort, union.Access, "Unrestricted U SmtpAccess.None");

			union = (SmtpPermission) spctup.Union (spctup);
			Assert.AreEqual (SmtpAccess.ConnectToUnrestrictedPort, union.Access, "ConnectToUnrestrictedPort U ConnectToUnrestrictedPort");
			union = (SmtpPermission) spctup.Union (spconnect);
			Assert.AreEqual (SmtpAccess.ConnectToUnrestrictedPort, union.Access, "ConnectToUnrestrictedPort U Connect");
			union = (SmtpPermission) spctup.Union (spnone);
			Assert.AreEqual (SmtpAccess.ConnectToUnrestrictedPort, union.Access, "ConnectToUnrestrictedPort U SmtpAccess.None");
			union = (SmtpPermission) spctup.Union (spn);
			Assert.AreEqual (SmtpAccess.ConnectToUnrestrictedPort, union.Access, "ConnectToUnrestrictedPort U None");
			union = (SmtpPermission) spctup.Union (spu);
			Assert.AreEqual (SmtpAccess.ConnectToUnrestrictedPort, union.Access, "ConnectToUnrestrictedPort U Unrestricted");

			union = (SmtpPermission) spconnect.Union (spctup);
			Assert.AreEqual (SmtpAccess.ConnectToUnrestrictedPort, union.Access, "Connect U ConnectToUnrestrictedPort");
			union = (SmtpPermission) spconnect.Union (spconnect);
			Assert.AreEqual (SmtpAccess.Connect, union.Access, "Connect U Connect");
			union = (SmtpPermission) spconnect.Union (spnone);
			Assert.AreEqual (SmtpAccess.Connect, union.Access, "Connect U SmtpAccess.None");
			union = (SmtpPermission) spconnect.Union (spn);
			Assert.AreEqual (SmtpAccess.Connect, union.Access, "Connect U None");
			union = (SmtpPermission) spconnect.Union (spu);
			Assert.AreEqual (SmtpAccess.ConnectToUnrestrictedPort, union.Access, "Connect U Unrestricted");

			union = (SmtpPermission) spnone.Union (spctup);
			Assert.AreEqual (SmtpAccess.ConnectToUnrestrictedPort, union.Access, "SmtpAccess.None U ConnectToUnrestrictedPort");
			union = (SmtpPermission) spnone.Union (spconnect);
			Assert.AreEqual (SmtpAccess.Connect, union.Access, "SmtpAccess.None U Connect");
			union = (SmtpPermission) spnone.Union (spnone);
			Assert.AreEqual (SmtpAccess.None, union.Access, "SmtpAccess.None U SmtpAccess.None");
			union = (SmtpPermission) spnone.Union (spn);
			Assert.AreEqual (SmtpAccess.None, union.Access, "SmtpAccess.None U None");
			union = (SmtpPermission) spnone.Union (spu);
			Assert.AreEqual (SmtpAccess.ConnectToUnrestrictedPort, union.Access, "SmtpAccess.None U Unrestricted");
		}