private void btnLista2Fajl_Click(object sender, EventArgs e)
        {

            saveFileDialog1.Filter =
                "Text files (*.txt)|*.txt|All files (*.*)|*.*";

            if (saveFileDialog1.ShowDialog() == DialogResult.OK)
            {

                StreamWriter sw = new StreamWriter(saveFileDialog1.FileName);

                List<objOsoba> t =
                    ListaObjOsoba.Instanca.ListObjOsobaVals;

                foreach (objOsoba o in t)
                {
                    sw.WriteLine(o.ToString());
                }

                sw.Close();
            };


        }