#!markdown

## Connect to the WPF app

First, let's start the WPF app and connect to it.

#!pwsh

Start-Process -NoNewWindow dotnet run

#!csharp

#!connect named-pipe --kernel-name wpf --pipe-name InteractiveWpf

#!markdown

## Formatter (Rendering)

#!csharp

#!wpf
#!dispatcher
using System.Windows.Media;

App.MainWindow.Background = new SolidColorBrush(Colors.Fuchsia);
App.MainWindow.Background

#!csharp

#!wpf
#!dispatcher
using System.Windows.Media;
using System.Windows.Controls;
using System.Windows;


var grid = (Grid)App.MainWindow.Content;
grid.Background = new SolidColorBrush(Colors.CadetBlue);
grid

#!markdown

## View Model Stuff

Create and apply a new view model to the main window.

#!csharp

#!wpf
using System.ComponentModel;
public class TestViewModel : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler PropertyChanged;

    private string _text = "Notebook Initial Value";
    public string Text
    {
        get => _text;
        set
        {
            if (_text != value)
            {
                _text = value;
                PropertyChanged.Invoke(this, new PropertyChangedEventArgs(nameof(Text)));
            }
        }
    }
}

var vm = new TestViewModel();
#!dispatcher
App.MainWindow.DataContext = vm;

#!markdown

Update the value on the data bound property.

#!csharp

#!wpf
vm.Text = "Value changed!"

#!markdown

 ## Dispatcher stuff

 Demonstate enabling and disabling running code on the dispatcher. 

#!csharp

#!wpf

#!dispatcher --enabled true
//This should work
App.MainWindow.Title = "Done correctly";

#!dispatcher --enabled false
//This is expected to fail
App.MainWindow.Title = "Not so much";