How do you close the notification control server side when the close X is not on the control. I have the AutoCloseDelay =0 so it will stay open until the user clicks my Ok or Cancel button.
You can use the RadNotification's Client-side API and call its hide() method via JavaScript. This is best done on the client - i.e. without a postback. If you need the logic in the code-behind you can inject the call to the JavaScript function from the code-behind as well.