I have a DataGridView that is bound to a list of objects through it's
datasource property.
If a cell in the grid is changed by editing directly in the cell I get
a CellValueChanged event.
If the value is changed in the underlying object that causes the cell
in the grid to get changed then the CellValueChanged event does not
occur.

Does anyone know of a way to detect a cell value changing for both
cases? I would like to detect the value change without leaving the row
since I am trying to give immediate visual feedback regarding the
validity of the data being entered and don't want the user to have to
leave the row to find out if data in a cell is valid.