public List<Users> select(string name)
        {
            List<Users> list = new List<Users>();
            cmd.CommandText = "select * from Car where name like @a";
            cmd.Parameters.Clear();
            cmd.Parameters.AddWithValue("@a",‘%‘+name+‘%‘);

            conn.Open();
            SqlDataReader dr = cmd.ExecuteReader();
            while (dr.Read()) 
            {
                Users u = new Users();
                u.Name = dr["name"].ToString();
                list.Add(u);
            }
            conn.Close();



            return list;
        }