CafeProject.frmProfil.idTut C# (CSharp) Метод

        public void idTut()
        {
            comboBox1.Text = "";
            comboBox1.Items.Clear();
            SqlCommand com = new SqlCommand("select * from profil", db.dbConnect());
            db.dbConnect();
            SqlDataReader dr = com.ExecuteReader();
            while (dr.Read())
            {
                li.Add(Convert.ToInt32(dr["id"]));
                comboBox1.Items.Add(dr["adi"].ToString());
            }
            db.dbClose();
        }