// Assuming 'viewer' is your Viewer control instance
viewer.Action += Viewer_CustomActionTriggered;;
// Handler for the CustomActionTriggered event
private void Viewer_CustomActionTriggered(object sender, ActionEventArgs e)
{
	var viewer = (Viewer)sender;
	// Check if there's a specific action defined
	if (e.Action != null)
	{
	    // Handle the custom action
	    HandleCustomAction(e.Action);
	}
	else if (e.PageNumber >= 0)
	{
	    // Navigate to the specified page number if no specific action is defined
	    viewer.CurrentPage = e.PageNumber;
	}
}
// Example method to handle a custom action
private void HandleCustomAction(IAction action)
{
	// Implement custom action handling logic here
	// This could involve checking the type of action and responding accordingly
	Debug.WriteLine($"Handling custom action: {action.GetType().Name}");
}