change backcolor row in datagrid

Hi,
I currently have a datagrid that is displaying items in an inventory. The user is able to modify inventory contents, and then there is a button to save the changes back to the SQL database.

What I would like to implement is something that will change the color of each row that the user has updated.

The only thing close that I've found is DataGrid.SelectionBackColor but the problem with that is that it changes the row color of the currently selected row, instead of row[x] in the DataGrid. So if the user moves the mouse to select a different row, the updated row loses the color, and the newly selected (non-updated) row gains it.

Anyone have a solution for a DataGrid to change the color of any row and then have it remain there?

I noticed you can't even get to an individual row with the DataGrid, there is no DataGrid.Row[x] feature. If there was, it might have a nice DataGrid.Row[x].BackColor property I could use.

Thanks in advance,

Steve