private void Listbox_BeforeDrawItem(object sender, ListBox.ObjectCollection items, DrawItemEventArgs e)
{
if (Items.Count != LastCount)
{
listbox.SetScrollInfo();
LastCount = Items.Count;
ItemsCountChange?.Invoke(this, null);
}
}
private void Timer_Tick(object sender, EventArgs e)
{
if (Items.Count == 0 && LastCount != 0)
{
LastCount = 0;
timer.Stop();
ItemsCountChange?.Invoke(sender, e);
timer.Start();
}
}