private void button1_Click(object sender, EventArgs e)
        {
            bool[,] values = new bool[,] { { true, true, true }, { true, true, false }, { true, true, true } }; // 3x3 array
            int[] sums = new int[3];
            
            for (int i = 0; i < 3; ++i)
                for (int j = 0; j < 3; ++j)
                {
                    sums[j] += values[i, j] ? 1 : 0;
                    //richTextBox1.Text = sums[j].ToString();
                }
            StringBuilder sb = new StringBuilder();
            sb.Append(sums[0].ToString());

            listView1.Columns.Add("# Pages");
            listView1.Columns.Add("# Outlinks",80);
            for (int i = 0; i < sums.Length; ++i)
            {                
                ListViewItem lvi = new ListViewItem(i.ToString());
                lvi.SubItems.Add(sums[i].ToString());
                listView1.Items.Add(lvi);
            }

            for (int i = 1; i < sums.Length; ++i)
            { 
                sb.Append(" ").Append(sums[i].ToString());
                richTextBox1.Text = sb.ToString();
            }            
        }