using strings for updating status

Question

hello, i wish to know which method is efficient ::
1) using strings directly to update status in my wpf application
          ex : statusBarText.Text = " updating...";    or
2) saving the strings in resource list and then using
          ex : statusBarText.Text = properties.resources.UPDATE; where UPDATE ="any string" 

 or there is no relation with efficiency but convenience?
thank you