System.Security.PermissionSet.Deny C# (CSharp) Method

        public void Deny() { throw new NotSupportedException(); }
        public override bool Equals(object o) => base.Equals(o);

        public void ReflectionFormatterReadSecurityExceptionPropertiesWithoutPermissionTest()
        {
            SecurityPermission denyPermission
                = new SecurityPermission(SecurityPermissionFlag.ControlPolicy | SecurityPermissionFlag.ControlEvidence);
            PermissionSet permissions = new PermissionSet(PermissionState.None);
            permissions.AddPermission(denyPermission);
            permissions.Deny();

            StringBuilder sb = new StringBuilder();
            StringWriter writer = new StringWriter(sb);

            SecurityException exception = null;
            try
            {
                DemandException(denyPermission);
            }
            catch (SecurityException e)
            {
                exception = e;
            }

            MockTextExceptionFormatter formatter = new MockTextExceptionFormatter(writer, exception, Guid.Empty);
            formatter.Format();

            CodeAccessPermission.RevertDeny();

            formatter = new MockTextExceptionFormatter(writer, exception, Guid.Empty);
            formatter.Format();
            Assert.AreEqual(exception.Demanded.ToString(), formatter.properties["Demanded"]);
        }