using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; using System.IO; using System.Collections; namespace draw_lots { public partial class MainForm : Form { static protected ArrayList arrList = new ArrayList (); static protected ArrayList GropNameList = new ArrayList (); static protected ArrayList IndexGropNameList = new ArrayList (); public MainForm() { InitializeComponent(); } private void listBox1_SelectedIndexChanged( object sender, EventArgs e) { } private void OpenFilebtn_Click