https://www.dotnetzone.gr:443/cs/blogs/abekiaris/archive/2009/08/13/implementing-master-detail-with-no-code.aspx  eXpand already has this scenario enabled for windows forms applications. What you have to do is set 2 attributes and you are done!!! You have force your grid to display a child grid view eXpand is hosted at http://code.google.com/p/expandframework/elCommunityServer 2.1 SP3 (Build: 20423.1)