I've got a 100MB dataset (40 cols, 500000 rows) that's using slightly more than that when in a datatable, but memory use rises to 760MB when the datatable is bound to a wpf grid, is there anything I can do to minimise the memory usage?

I've made sure the datagrid has a fixed width / height (I read that if this isn't done UI virtualisation is not enabled).

Any pointers appreciated.

- Anthony