public static void Main(string[] args) { BinaryTree tree = new BinaryTree(1); tree.leftChild = new BinaryTree(2); tree.rightChild = new BinaryTree(3); tree.leftChild.leftChild = new BinaryTree(4); tree.leftChild.rightChild = new BinaryTree(5); tree.rightChild.leftChild = new BinaryTree(6); Invert invert = new Invert(); invert.InvertBTree(tree); }