public void findNonExistentData()
        {
            BinaryTree aTree = new BinaryTree(4);

            aTree.addToTree(2);
            aTree.addToTree(6);
            aTree.addToTree(1);
            aTree.addToTree(3);
            aTree.addToTree(5);
            aTree.addToTree(8);
            aTree.addToTree(7);

            Assert.IsFalse(aTree.dataExist(10));
        }