static void Main(string[] args)
{
BinaryTree tree = new BinaryTree();
tree.root = new Node(1);
tree.root.left = new Node(2);
tree.root.right = new Node(3);
tree.root.left.left = new Node(4);
tree.root.left.right = new Node(5);
TreeTraversal treeTraversal = new TreeTraversal();
treeTraversal.FindLeastCommonAncestor(tree.root, 5, 4);
treeTraversal.InOrderIterative(tree.root);
treeTraversal.InOrderRecursive(tree.root);
}