- How to handle the access denied event for RunWithElevatedPrivileges?
 - How to define/use SPSite and SPWeb objects in event receivers?
 - How to handle the event receiver scope level in event receiver?
 - The Modified By/Modified columns should not be updated if there no changes made in the SharePoint list/library?
 - Dispose objects in event receivers?
 
Answers for the above questions are in progress and published soon.