title: C# DataGridView Adding a Row - When validating, how do I know the row is new and not yet committed?
body: <p>I have a client having a problem with a DataGridView in a Windows app.  They are calling the CellValidated event, but they want to have different validation for the cell if it is in a row that is already committed back to the datasource than if it is a row that is first being added (and not yet committed (the user hasn't left the row yet).  I tried the IsNewRow property, but as soon as you start typing in the row, another "new row" is added, so the row you are working with is no longer considered the new row.  I know the row has not been committed yet because you can hit Esc to cancel editing, and the entire row goes away.</p>
  
  <p>Is there a way to tell if the currently edited row is actually the "new row" in the sense that it hasn't been committed back to the datasource?</p>