public void llist1_Init_error()
 {
     LList1 ll = new LList1();
     ll.Init(new int[] { 1, 2, 9, 5, 6, 2 });
     LList1 al1 = new LList1();
     al1.Init(new int[] { 1, 2, 9, 5, 6, 2 });
    // llist al1 = new llist(new int[] { 1, 2, 9, 5, 6, 2 });
     Assert.AreEqual(ll.ToString(), al1.ToString());
     //Assert.AreEqual("1 2 9 5 6 ", al.ToString());
 }