public void ThrowArgumentOutOfRangeExceptionWhenInvalidIndexIsRetrieved()
 {
     RecentlyUsedList<Employee> ob = new RecentlyUsedList<Employee>(2);
     Employee e1 = new Employee();
     Employee e2 = new Employee();
     Employee e3 = new Employee();
     ob.MyInsert(e1);
     ob.MyInsert(e2);
     ob.MyInsert(e3);
     Assert.AreEqual(e3, ob[0]);
     Assert.AreEqual(e2, ob[1]);
     Assert.AreEqual(e1, ob[2]);
     
 }
         public void ReturnETwoWhenFirstIndexIsRetrieved()
         {

             RecentlyUsedList<Employee> ob = new RecentlyUsedList<Employee>(2);
             Employee e1 = new Employee();
             Employee e2 = new Employee();
             ob.MyInsert(e1);
             ob.MyInsert(e2);
             Assert.AreEqual(e2, ob[0]);
             Assert.AreEqual(e1, ob[1]);
         }