Beginners help in Visual Studio/c# needed

I am recreating a project I did over 20 years ago to calculate the mandelbrot set.  The code I have written is very simple yet is behaving strangely in two ways:

1) Where I have put in the statusLabel.text = "Working" - it does not change the value on screen.  Even if I put a sleep command in after the change, it still remains at the original value.

2) At the moment, the program will draw a block of orange pixels (haven't figured out the mathematics yet) but only if the Console.WriteLine commands are there.  If I comment them out, not a single pixel is drawn.

---
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Threading;

namespace Mandelbrot3
{
    public partial class Mandelbrot : Form
    {
        public Mandelbrot()
        {
            InitializeComponent();
            statusLabel.Text = "Ready";
        }    

        private void goButton_Click(object sender, EventArgs e)
        {
            int Width = 320, Height = 160, x, y, n;

            Bitmap b = new Bitmap(Width, Height);
            mandelbrotPanel.BackgroundImage = (Image)b;

            double MinRe = -2.0;
            double MaxRe = 1.0;
            double MinIM = -1.2;
            double MaxIM = MinIM + (MaxRe - MinRe)*Height / (this.Width);
            double ReFactor = (MaxRe - MinRe) / this.Width-1;
            double ImFactor = (MaxIM - MinIM) / this.Height-1;
            int maxiterations = 150;
            int maxlimit = 50;

            int iteration = 0;

            mandelbrotPanel.BackgroundImageLayout = ImageLayout.None;

            statusLabel.Text = "Working";

            for (y = 0; y < Height; ++y)
            {
                Console.Write("Y is {0}\n", y);
                Boolean isInside;

                double c_im = MaxIM - y * ImFactor;
                for (x = 0; x < Width; ++x)
                {
                    double c_re = MinRe + x * ReFactor;
                    double Z_re = c_re, Z_im = c_im;
                    isInside = true;
                    for (n = 1; n < maxiterations; n++)
                    {
                        iteration = n;
                        double Z_re2 = Z_re * Z_re, Z_im2 = Z_im * Z_im;
                        if (Z_re2 + Z_im2 > maxlimit)
                        {
                            isInside = false;
                            break;
                        }
                        Z_im = (2 * Z_re * Z_im) + c_im;
                        Z_re = (Z_re2 - Z_im2) + c_re;
                    }
                    if (isInside)
                    {
                        b.SetPixel(x, y, Color.Black);
                        Console.WriteLine("Inside X is {0}", x);
                    }
                    else
                    {
                        b.SetPixel(x, y, Color.DarkOrange);
                        Console.WriteLine("Outside X is {0}", x);
                    }
                }
            }
            statusLabel.Text = "Done";
        }
    }
}

--- Thanks for the help in advance.