WPF Windows: Code-based layout versus XAML

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace Windows
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            CodeWindows.CanvasWindow cw = new CodeWindows.CanvasWindow();
            cw.Visibility = System.Windows.Visibility.Visible;    
        }

        private void button2_Click(object sender, EventArgs e)
        {
            CodeWindows.StackPanelWindow sw = new CodeWindows.StackPanelWindow();
            sw.Visibility = System.Windows.Visibility.Visible; 
        }

        private void button3_Click(object sender, EventArgs e)
        {
            CodeWindows.DockPanelWindow dw = new CodeWindows.DockPanelWindow();
            dw.Show(); 
        }

        private void button4_Click(object sender, EventArgs e)
        {
            CodeWindows.GridWindow gw = new CodeWindows.GridWindow();
            gw.Show();
        }
    }
}