private void button9_Click(object sender, EventArgs e) { CheckStatus(txt_ipaddress.Text); axCZKEM1.ReadAllUserID(1); SyncInfo s = new SyncInfo(); List <SyncInfo> ls = new List <SyncInfo>(); while (axCZKEM1.SSR_GetAllUserInfo(1, out s.EnrollNumber, out s.Name, out s.Password, out s.Privilege, out s.IsEnabled))//get all the users' information from the memory { ls.Add(s); axCZKEM1.SSR_DeleteEnrollDataExt(1, s.EnrollNumber.ToString(), 12); s = new SyncInfo(); } MessageBox.Show("deleted"); }