Just deactivate the Inherit permissions from parent objects option. If you do that, you can choose whether you keep all the inherited entries as directly entries, or if you want to remove all the inherited entries from the ACL. You can easily change the propagation above..
It exposes information of the object in terms of Properties, Attributes, Events, etc. Even though the basic usage of TypeDescriptor is to get metadata of an object, yet it also exposes features to extend the object on the fly. Let us now discuss few capabilities of Descriptors with a little information ssex its usage.