public void SinglyThreadedBinarySearchTreeMethod()
        {
            root = new Node1(100);
            SinglyThreadedBinarySearchTree st = new SinglyThreadedBinarySearchTree();

            st.insert(root, 50);
            st.insert(root, 25);
            st.insert(root, 7);
            st.insert(root, 20);
            st.insert(root, 75);
            st.insert(root, 99);

            st.print(root);
        }
 public Node1 leftMostNode(Node1 Node1)
 {
     if (Node1 == null)
     {
         return(null);
     }
     else
     {
         while (Node1.left != null)
         {
             Node1 = Node1.left;
         }
         return(Node1);
     }
 }
        public void print(Node1 root)
        {
            Node1 current = leftMostNode(root);

            while (current != null)
            {
                Console.Write(" " + current.data);
                if (current.rightThread)
                {
                    current = current.right;
                }
                else
                {
                    current = leftMostNode(current.right);
                }
            }
            Console.WriteLine();
        }
        public void insert(Node1 root, int id)
        {
            Node1 newNode = new Node1(id);
            Node1 current = root;
            Node1 parent  = null;

            while (true)
            {
                parent = current;
                if (id < current.data)
                {
                    current = current.left;
                    if (current == null)
                    {
                        parent.left         = newNode;
                        newNode.right       = parent;
                        newNode.rightThread = true;
                        return;
                    }
                }
                else
                {
                    if (current.rightThread == false)
                    {
                        current = current.right;
                        if (current == null)
                        {
                            parent.right = newNode;
                            return;
                        }
                    }
                    else
                    {
                        Node1 temp = current.right;
                        current.right       = newNode;
                        newNode.right       = temp;
                        newNode.rightThread = true;
                        return;
                    }
                }
            }
        }