protected UIElement(UIElement parent = null)
{
Padding = new Padding();
Padding.Left = Padding.Right = Padding.Top = Padding.Bottom = 3;
Children = new LinkedList<UIElement>();
Style = GetType().Name;
Parent = parent;
Text = "";
}
private void RemoveChild(UIElement element)
{
Children.Remove(element);
Invalidate();
}
private void AddChild(UIElement element)
{
Children.AddLast(element);
Invalidate();
}