i assigned collection to data source of grid
and made some changes to the fieldlayout
like preventing from editing some columns and others and I prevent from displaying all properties in the collection
this leaded to not display the heirarchical data the related to each row .
thanks alot for your answer but th e answer came after i solved the problem
the problem was that i don't know how to customize xamDataGrid In right way but now I know
any way could you answer me about the question related in the following
post [http://forums.infragistics.com/forums/t/18520.aspx]
I'm not sure what would have caused this to happen.
What version of our WPF controls are you using? Are you able to reproduce this behavior?