The Completely Customizable Vendor - .NET 4.0 and Cleaned Up 2014-12-25

I figured it was about time to clean this system up. Removed a lot of nesting, converted foreach loops to use linq, among hundreds of other edits.

Original Author: krazeykow

Original System: http://www.runuo.com/community/threads/runu-o-2-0-rc1-rc2-the-complete-customizable-vendor.91051/