private static UIElement GetUIElementChecked(ObjectHolder element)
{
var uiElement = element.Value as UIElement;
if (uiElement == null)
throw new InvalidOperationException(Resources.Message_UIElement_is_not_valid);
return uiElement;
}
public void RemoveUIElement(ObjectHolder element)
{
var uiElement = GetUIElementChecked(element);
if(_stackPanel.Children.Contains(uiElement))
_stackPanel.Children.Remove(uiElement);
}
public void AddUIElement(ObjectHolder element)
{
var uiElement = GetUIElementChecked(element);
if (!_stackPanel.Children.Contains(uiElement))
_stackPanel.Children.Add(uiElement);
}