simulate: “file Streams into Memory, then JOIN the data in Memory, via LINQ to Objects” original article: http://blogs.claritycon.com... I wrote up a quick little WinForms project in VS2008 with .NET Framework 3.5, Code overview: 1. On Form_Load, a. create a List of People into DataDridView and in Memory b. create a List of Jobs into DataDridView and in Memory c. create a List of JobIds into ComboBox 2. On ComboBox_SelectedIndexChanged, a. Perform LINQ...