private void btnSort_Click(object sender, EventArgs e)
    {
        int temp = 0;
        int i;

        for (i = 0; i < random_number.Length; i++)
        {
            for (int sort = 0; sort < random_number.Length - 1; sort++)
            {
                if (random_number[sort] > random_number[sort + 1])
                {
                    temp = random_number[sort + 1];
                    random_number[sort + 1] = random_number[sort];
                    random_number[sort] = temp;
                }
            }
        }

        for (i = 0; i < 10; i++)
        {
            richTextBox1.Text = richTextBox1.Text + random_number[i] + "rn";
        }
    }

    private void btnSearch_Click(object sender, EventArgs e)
    {

    }