title: Force validation of every cell of a Datagrid when button is pressed
body: <p>How can I force all the cells to validate in a datagrid in a c# winform application when a ToolStripButton is pressed?</p>
  
  <p>I have individual cell validation working when the user edits the cell it calls my cell validating event.  But, I can't get it to validate all cells when a button is pressed.  I tried calling Validate() but it's not calling the CellValidating function on every cell</p>