11.

Which of the following is not a valid property of update panel in C#?

There is no property named 'TriggerEvent' under updatepanel.

  1. UpdateMode: Gets or sets a value that indicates when an UpdatePanel control's content is updated.
  2. Triggers: Gets an UpdatePanelTriggerCollection object that contains AsyncPostBackTrigger and PostBackTrigger objects that were registered declaratively for the UpdatePanel control.
  3. RequiresUpdate: Gets a value that indicates whether the content of the UpdatePanel control will be updated.
  4. ChildrenAsTriggers: Gets or sets a value that indicates whether postbacks from immediate child controls of an UpdatePanel control update the panel's content.