private void button1_Click(object sender, EventArgs e)
{
string[] drive_list =System.Environment.GetLogicalDrives();
foreach(string drive in drive_list)
{
listBox1.Items.Add(drive);
}
}
private void button2_Click(object sender, EventArgs e)
{
string drive = listBox1.SelectedItem.ToString();
string[] folders = System.IO.Directory.GetDirectories(drive);
string[] files= System.IO.Directory.GetFiles(drive);
foreach(string folder in folders)
listBox2.Items.Add(folder);
foreach(string file in files)
listBox2.Items.Add(file);
}