Extending the BootstrapperApplication class

The first class we'll add to our project will provide the bridge between our code and the Burn engine. Add a new C# class file and name it CustomBootstrapperApplication. It should extend the BootstrapperApplication class from the Microsoft.Tools.WindowsInstallerXml.Bootstrapper namespace. Add the following code:

using CustomBA.Models;
using CustomBA.ViewModels;
using CustomBA.Views;
using Microsoft.Tools.WindowsInstallerXml.Bootstrapper;
using System;
using System.Windows.Threading;

namespace CustomBA
{
    public class CustomBootstrapperApplication : 
      BootstrapperApplication
    {
        public static Dispatcher Dispatcher { get; set; }
        
        protected override void Run()
        {
            Dispatcher = Dispatcher.CurrentDispatcher;

            var model = new BootstrapperApplicationModel(this);
            var viewModel = new InstallViewModel(model);
            var view = new InstallView(viewModel);

            model.SetWindowHandle...