private void AnalyseNL_Click(Object sender, RoutedEventArgs e)
        {
            Dictionary <string, int> temp_dic = new Dictionary <string, int>(Network_dic);
            DrawChart nl_chart = new DrawChart("Network Layer", temp_dic);

            nl_chart.Show();
        }
        private void AnalyseTL_Click(Object sender, RoutedEventArgs e)
        {
            Dictionary <string, int> temp_dic = new Dictionary <string, int>(TRANS_dic);
            DrawChart nl_chart = new DrawChart("Transport Layer", temp_dic);

            nl_chart.Show();
        }