remove

        public void RemoveStudent(string name, string lastname)
        {

            string _name = Student.FirstCapital(name);
            string _lastname = Student.FirstCapital(lastname);

            int index = 0; 

            foreach (Student student in Items)
            {
                if (student.Name == _name && student.Lastname == _lastname)
                {
                    index = Items.IndexOf(student);
                }
            }

            RemoveAt(index);

        }