I need a way to delay refreshing of a data grid until all my edits are done.

I have a dataGridView that is loaded with various data items, and I'd like to
stop painting of the grid while I assemble and load all that needs to be displayed
in order to smooth out the data display. Then, when all the data is loaded into the grid, behind the scenes,
refresh the screen with all the glorious new data.

It wouldn't bother me to "lock down" the whole UserControl if that's what it took.

Thanks.