While off reading random blog posts on the tubes, I stumbled upon a post that describes a 101-level scenario of using lookup data in the DataGrid and DataForm with RIA Services. The author was struggling to find a solution for the problem and was clearly frustrated. The scenario is very common; let’s use the Cars example where every Model refers to its Make. We want a DataGrid that includes the make name as a column: And we want a DataForm with a ComboBox for the Make: ...