Solved! Go to Solution.
That is part of the featuredatagrid. The featuredatagrid is part of the toolkit you can download -source code and all - from http://esrisilverlight.codeplex.com/
Lance
Great, thank you. It looks like the FeatureDataGrid has default properties that give it a certian look. Is there a way to access the user controls for this control without using Expression Blend (I'm using VS2010)? From the little experience that I have with Expression Blend, you simply select the control in the design window and the xaml code is made available.