public void Add(T data)
{
int depth = 0;
Node <T> node = new Node <T>(data);
if (root == null)
{
node.ID = IDGenerator.GenerateRootID();
root = node;
nodes.Add(node, new KeyValuePair <int, string>(depth, "Root"));
return;
}
if (!IsNodeDuplicated(root, node))
{
AddRecursive(depth + 1, root, node);
}
}