I get the Type 'RecordDeletedEvent' is not defined error several times. Where/what file should this be defined in?

This event class is defined in the TBHCustomEvents project.

Unless you have added the TBHCustomEvents project to your solution, and added a reference to it (or at least placed the dll for it in the bin folder), you will keep getting this error.

If you are not interested in tracking information about delete events (like which records were deleted, and by whom), you can simply remove the calls to the RecordDeletedEvent constructor in the various Delete methods in the BLL.

How do you add in an entire project such as TBH_Custom_Events to another project, in this case, TheBeerHouse?

Right-click on Solution.

Go to Add > Existing Project

Find the project and add it

Right-click on web site and choose Add Reference...

Go to the Projects tab

Choose the project you just added to the Solution

Build everything

Have fun.