private void generujHistogramToolStripMenuItem_Click(object sender, EventArgs e)
        {
           histogram_form hist =new histogram_form();
           string[] nazwySerii={"seria 1","seria2"};
           double[] wartosci = liczby_generowane;
           Array.Sort(wartosci);
           hist.histogram_chart.Titles.Add("tytul");

           H = new int [ 50 ];

           for (int i = 0; i < 50; i++) H[ i ] = 0;

           for (int i = 0; i < wartosci.Length; i++) H[ (int)( wartosci[ i ] / 50.0 ) ] ++;

            Series serie;

           for (int i = 0; i < 50; i++)
           {
               serie = hist.histogram_chart.Series.Add( i );
               hist.histogram_chart.Series[ i ].IsVisibleInLegend = false;
               serie.Points.Add( H[i] );
           }
           hist.Show();
        }