C#/ListView extensions

ListViewExtensions.cs

 public static class ListViewExtensions
    {
        public static string GetItemsString(
            this System.Windows.Forms.ListViewItem lvi,
            string SurroundL = "\"",
            string SurroundR = "\"",
            string Join = "\t")
        {
            List<string> s = new List<string>();
            foreach (System.Windows.Forms.ListViewItem.ListViewSubItem CurSub in lvi.SubItems)
                s.Add(string.Format("{0}{1}{2}", SurroundL, CurSub.Text, SurroundR));

            return string.Join(Join, s);
        }

        public static void SelectAll(
            this System.Windows.Forms.ListView lv)
        {
            lv.BeginUpdate();
            foreach (System.Windows.Forms.ListViewItem lvi in lv.Items)
                lvi.Selected = true;
            lv.EndUpdate();
        }
    }