;
for (int i = 1; i < 51; i++)
{
cell.Items.Add(i);
}
}

However, after the user changes a value in the drop down combo box, and moves the focus to another cell, a "System.ArgumentException:
DataGridViewComboBoxCell value is not valid".

Googling shows an extensive number of people suffering the same, but I'm none the wiser.

Is there a simple solution to this?

Greg.