query webbrowser c #

I have a question if this can be stated like this because I am reading the same URL instead of the ones listed, I do not know if I have to destroy the object "browser" or how would it be? I'm new using this

  for (int i=0;i<listView1.Items.Count;i++)
        {

           string nombrepj= listView1.Items[i].SubItems[0].Text;
           string url_Completa = url_base + nombrepj;

            navegador.Navigate(url_Completa);
            navegador.ScriptErrorsSuppressed = true; //oculta los errores de script
            navegador.DocumentCompleted += datos_cargados;

        }