private void BtnChangeIPs_Click(object sender, RoutedEventArgs e)
{
String include = txtInclude.Text;
String exclude = txtExclude.Text;
List <String> ips = IPRange.RangeListStringToIPList(include);
ips = IPRange.ExcludeFromListString(ips, exclude);
MSSQL ms = new MSSQL();
ms.AddIPs(ips);
txtInclude.Text = "";
txtExclude.Text = "";
PopulateTree();
}