static void Main(string[] args)
{
Tree tree = new Tree();
tree.AddNode(3);
tree.Insert(tree.root, tree.AddNode(2));
tree.Insert(tree.root, tree.AddNode(1));
tree.Insert(tree.root, tree.AddNode(4));
tree.Insert(tree.root, tree.AddNode(10));
tree.Insert(tree.root, tree.AddNode(6));
tree.Print(tree.root);
}