Represents the method that will handle the ColumnChanging event.
Assembly: System.Data (in System.Data.dll)
When you create a delegate, you identify the method that will handle the event. To associate the event with your event handler, add an instance of the delegate to the event. The event handler is called whenever the event occurs, until you remove the delegate. For more information about delegates, see Events and Delegates.
The declaration of your event handler must have the same parameters as the DataColumnChangeEventHandler delegate declaration.