public virtual void AddChild(TreeItem <T> child)
{
child.ThrowArgumentExceptionIfNull(nameof(child));
child.parent = this;
this.children.Add(child);
}
public static void CreateTree <T>(this TreeItem <T> parent, Func <T, IEnumerable <T> > getChildren)
{
parent.ThrowArgumentExceptionIfNull(nameof(parent));
getChildren.ThrowArgumentExceptionIfNull(nameof(getChildren));
var children = getChildren(parent.Item).Select(c => new TreeItem <T>(c)).ToList();
parent.AddChildren(children);
foreach (var child in children)
{
child.CreateTree(getChildren);
}
}