/// <summary>
/// Remove a child element from this element
/// </summary>
/// <param name="element"></param>
public void Remove(Element element)
{
if (children != null && element != null && element.parent == this)
{
children.Remove(element);
ResetParent(element);
}
}
/// <summary>
/// Set parent to null
/// </summary>
/// <param name="element"></param>
protected void ResetParent(Element element)
{
element.parent = null;
}
/// <summary>
/// Add a child element to this element
/// </summary>
/// <param name="element"></param>
public void Add(Element element)
{
if (element == null)
throw new ArgumentNullException();
if (element.parent != null)
throw new InvalidOperationException("element.parent");
SetParentToThis(element);
if (children == null)
children = new List<Element>();
children.Add(element);
}
/// <summary>
/// Set the parent of <paramref name="element"/> to this
/// </summary>
/// <param name="element"></param>
protected void SetParentToThis(Element element)
{
element.parent = this;
}
