Ok, I give up, I know it's me and not the code, here's my error:
//Save the changes to the database
db.SubmitChanges();
Error Description:
"V2.PaidTimeOffDAL.HRPaidTimeOffDataContext' does not contain a definition for 'SubmitChanges' and no extension method 'SubmitChanges' accepting a first argument of type 'V2.PaidTimeOffDAL.HRPaidTimeOffDataContext' could be found (are you missing a using directive or an assembly reference?)"

I have added the following reference:
using.System.Linq;
using.Data.
using V2.PaidTimeOffDAL

Thanks for your help guys. I'm just starting my journey.

45 people viewed my posted problem, neither have a solution.. anyways I was able to figured out the problem, I needed to add this reference to my web.config file.
<add assembly="System.Data.Linq, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>

I know this is an advanced book, however the author made a good job of explaining most of the details clear.