static void Main(string[] args)
{
BinaryTree tree = new BinaryTree();
tree.root = new Node(10);
tree.root.left = new Node(20);
tree.root.right = new Node(30);
tree.root.left.right = new Node(40);
tree.root.left.right.left = new Node(50);
tree.root.left.right.right = new Node(60);
tree.root.right.right = new Node(70);
tree.root.right.right.left = new Node(99);
Console.WriteLine("Max element is " + BinaryTree.findMax(tree.root));
}