In my `datagridview`, four columns 1 & 2 are read only col 3 & 4 got number values. I want to compare that 4th column must be greater that 3rd column. 
For example:

![enter image description here](https://i.stack.imgur.com/7fpSh.jpg)

If the 4th column value is less than the 3rd column then I want to propose message doesn't navigate to another control. 

My simple approach seems not working. How can I compare 2 specific columns for this kind of condition?

```
private void datagridview_CellValidating(object sender, CellValidatingEventArgs e)
{
    try
    {
        int bbor = datagridview.CurrentCell.ColumnIndex;
        int ebor = datagridview.CurrentCell.RowIndex;
        if (ebor <= bbor)
        {
            MessageBox.Show("Please verify the value");
            e.Cancel = true;
        }
    }
    catch (Exception exception)
    {
    }
}

```