When a person is assigned to a particular role definition at subweb level, I'd like to intercept that event in order to also assign them read access at the site collection's root web level.
(I use some master lists at the root web to feed dropdowns in the subwebs, so users in the subwebs need read permission on the root web. The subwebs are set to not inherit permissions from the root and the ownership is delegated to end user administrators. I'd like them to be able to manage their own membership, but I'm hoping to automate the setting of the root web membership. i.e. "As you add user X in subweb A the event is trapped and via code we automatically also assign user X read permission at the rootweb.)
I can't seem to find any event that would allow such - was hoping for something like RoleAssignment_Adding and RoleAssignment_Deleting.
Any suggestions?