Most popular item in collection

        private string mostPopularTag()
        {
            List<string> listaTagova = new List<string>();
            for (int i = 0; i < Zivotinje.getInstance().getZivotinjskeVrste().Count; i++)
            {
                string[] tokens = Zivotinje.getInstance().getZivotinjskeVrste()[i].ZTag.Split(new string[] { ", " }, StringSplitOptions.None);
                listaTagova.AddRange(tokens);
            }

            var most = listaTagova.GroupBy(i => i).OrderByDescending(grp => grp.Count()).Select(grp => grp.Key).First();
          //  MessageBox.Show(most.ToString());

            return most.ToString();
        }