How to Join Multiple Columns with Linq To SQL

I've been developing software since I was 9 years old, in BASIC on a Precomputer 2000. OK, that's a stretch, but hopefully some of the stuff that I learned from that little toy have helped my professional career.

I have a bachelors degree in computer science from MTSU. Currently, I am employed as a senior software developer for LBMC in Nashville, TN. We serve as consultant developers for clients across the southeastern United States, developing mostly in Microsoft .Net with Microsoft SQL Server.

I greatly enjoy my job and my hobbies lie in open source software and in teaching others how to be better programmers. I have a beautiful wife, 2 dogs (a dachshund and an olde-english bulldog) and a cat.