public void RandomMapButton_Click(int i, int n_x_down_, int n_x_up_)
        {
            for (int k = n_x_down_; k <= n_x_up_; k++)
            {

                int j;
                Random randomObject = new Random();
                j = randomObject.Next(0, i+1);

                //MessageBox.Show(j.ToString());

                for (int l = 1; l <= ny; l++)
                {
                    if (solo[k, l] != 1 && j <= i)
                    {
                        solo[k, l] = 1;
                        j++;
                    }
                }
                j = 0;
            }
        }