I am searching about how to create the columns of the DataGrid from the ToolKit dynamic in MvvM way. But looks like it is impossible !
Is there some one that had to
Having a similar problem, I did not want to add another dependency property. My workaround was to organise the data to display in the DataGrid in a DataTable and bind the DataGrid ItemSource property to this DataTable (with of course AutoGenerateColumns set to true).
It works well, DataGrids seem happy with DataTable as source.