public TSBNode searchValue(TSBNode node, string value)  //返回查找到的结点
        {
            TSBNode temp;

            if (node == null)
            {
                return(null);
            }
            else if (node.getValue() == value)
            {
                return(node);
            }
            else
            {
                temp = searchValue(node.getSonNode(), value);
                if (temp != null)
                {
                    return(temp);
                }
                else
                {
                    return(searchValue(node.getBroNode(), value));
                }
            }
        }
        public void displayTree(TSBNode node)
        {
            string sb, son;

            if (node != null)
            {
                if (node.getBroNode() == null)            //判断该结点的兄弟结点是否为空,若为空则显示null,若不空则显示它的值
                {
                    sb = "Null";
                }
                else
                {
                    sb = node.getBroNode().getValue().ToString();
                }

                if (node.getSonNode() == null)        ////判断该结点的孩子结点是否为空,若为空则显示null,若不空则显示它的值
                {
                    son = "Null";
                }
                else
                {
                    son = node.getSonNode().getValue().ToString();
                }

                mystr += node.getValue().ToString() + "\t\t\n" + son + "\t\t\t\n" + sb + "\r\n";
                displayTree(node.getSonNode());
                displayTree(node.getBroNode());
            }
        }