Rich will show how to use LINQ (linq to objects) to do a group join on 2 SharePoint lists that have a common field, but that field is not a lookup to other list. Although the tip was based on a need in SharePoint, it is valuable to all .net developers since it uses LINQ.
Rich Ross is a Technical Solutions Professional at the Microsoft Philadelphia MTC. He has more than 20 years of business and IT experience in the pharmaceutical and consulting industry. Rich has developed solutions for every version of SharePoint, from simple department portals to enterprise level applications. Over the last few years, he has focused on developing for the cloud using Azure technologies and is very interested in developing solutions containing IoT, Cortana and 3D Cameras features. Rich posts about technology on his blog at http://richross.me/ and you can follow him on twitter @rich_ross.