private void itemName_LostFocus(object sender, RoutedEventArgs e)
{
try {
if (!AdditionalData.GetItemNames().Contains(itemName.Text) && itemName.Text.Length > 0 && itemName.Text != "None")
{
AdditionalData.AddItemName(itemName.Text);
}
}
catch (Exception)
{
}
OnNodeDataChanged(sender, e);
}