private void saveSingleToolStripMenuItem_Click(object sender, EventArgs e)
{
ArrayList Arr = (ArrayList)lstProtos.SelectedObjects;
List<ItemProto> Prots = new List<ItemProto>((ItemProto[])Arr.ToArray(typeof(ItemProto)));
if (Prots.Count > 0)
SaveProtos(Prots);
else
Message.Show("No items selected.", MessageBoxButtons.OK, MessageBoxIcon.Error);
}