Touch Game

Learn creating a Touch Game using Windows App SDK with this Tutorial

Touch Game shows how you can create a pattern matching game using a toolkit from NuGet using the Windows App SDK.

Step 1

Follow Setup and Start on how to get Setup and Install what you need for Visual Studio 2022 and Windows App SDK.

In Windows 11 choose Start and then find or search for Visual Studio 2022 and then select it.
Visual Studio 2022
Once Visual Studio 2022 has started select Create a new project.
Create a new project
Then choose the Blank App, Packages (WinUI in Desktop) and then select Next.
Blank App, Packages (WinUI in Desktop)
After that in Configure your new project type in the Project name as TouchGame, then select a Location and then select Create to start a new Solution.
Configure project

Step 2

Then in Visual Studio within Solution Explorer for the Solution, right click on the Project shown below the Solution and then select Manage NuGet Packages...

Manage NuGet Packages

Step 3

Then in the NuGet Package Manager from the Browse tab search for Comentsys.Toolkit.WindowsAppSdk and then select Comentsys.Toolkit.WindowsAppSdk by Comentsys as indicated and select Install

NuGet Package Manager Comentsys.Toolkit.WindowsAppSdk

This will add the package for Comentsys.Toolkit.WindowsAppSdk to your Project. If you get the Preview Changes screen saying Visual Studio is about to make changes to this solution. Click OK to proceed with the changes listed below. You can read the message and then select OK to Install the package, then you can close the tab for Nuget: TouchGame by selecting the x next to it.

Step 4

Then in Visual Studio within Solution Explorer for the Solution, right click on the Project shown below the Solution and then select Add then New Item…

Add New Item

Step 5

Then in Add New Item from the C# Items list, select Code and then select Code File from the list next to this, then type in the name of Library.cs and then Click on Add.

Add New Code File

Step 6

You will now be in the View for the Code of Library.cs, within this type the following Code:

using Comentsys.Toolkit.WindowsAppSdk;
using Microsoft.UI;
using Microsoft.UI.Xaml;
using Microsoft.UI.Xaml.Controls;
using Microsoft.UI.Xaml.Media;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Windows.UI;

public class Library
    private const string title = "Touch Game";
    private const int size = 2;
    private const int level = 10;
    private const int delay_duration = 250;
    private const int timer_duration = 500;
    private static readonly Dictionary<int, Color> _options = new()
        { 0, Colors.Red },
        { 1, Colors.Blue },
        { 2, Colors.Green },
        { 3, Colors.Gold }
    private readonly Random _random = new((int)DateTime.UtcNow.Ticks);

    private Grid _grid;
    private int _score;
    private bool _over;
    private int _index;
    private bool _playing = false;

    private Dialog _dialog;
    private DispatcherTimer _timer;
    private List<int> _values = new();

    // Choose, Option & Set

    // Play

    // Add & Layout

    // Tick & New


The Class defined so far Library.cs has using for package of Comentsys.Assets.FluentEmoji and others. It also has Constants to represent things needed in the game and there are Variables to keep track of values used in the game and elements for the look-and-feel of the game.

Step 7

Still in the Class for Library.cs after the Comment of // Choose, Option & Set type the following Methods:

private List<int> Choose(int minimum, int maximum, int total)
    var choose = new List<int>();
    var values = Enumerable.Range(minimum, maximum).ToList();
    for(int index = 0; index < total; index++)
        var value = _random.Next(0, values.Count);
    return choose;

private Viewbox Option(int option) => new()
    Child = new Piece()
        IsSquare = true,
        Name = $"{option}",
        Stroke = new SolidColorBrush(_options[option])

private async void Set(int option)
    var piece = _grid.FindName($"{option}") as Piece;
    piece.Fill = piece.Stroke;
    await Task.Delay(delay_duration);
    piece.Fill = null;

Choose is used to select a set of random numbers that are not unique. Option is used to get the Piece needed to show the pattern and Set is used to update the Piece to indicate a part of the pattern.

Step 8

While still in the Class for Library.cs after the Comment of // Play type in the following Method:

private void Play(int option)
    if (!_playing)
        if (!_over)
            var correct = _values[_index] == option;
            if (correct)
                if (_index < _score)
                    if (_score < level)
                        _index = 0;
                        _over = true;
                _over = true;
        if (_over)
            _dialog.Show($"Game Over! You scored {_score} out of {level}!");

Play is used set the option for the pattern along with checking to see how many correct patterns have been performed and will display a Dialog the score if the pattern is not correct or the game is over.

Step 9

While still in the Class for Library.cs after the Comment of // Add & Layout type in the following Methods:

private void Add(Grid grid, int row, int column, int option)
    Button button = new()
        Width = 100,
        Height = 100,
        Tag = option,
        Content = Option(option),
        Margin = new Thickness(5)
    button.Click += (object sender, RoutedEventArgs e) => 
    button.SetValue(Grid.ColumnProperty, column);
    button.SetValue(Grid.RowProperty, row);

private void Layout(Grid grid)
    for (int index = 0; index < size; index++)
        grid.RowDefinitions.Add(new RowDefinition());
        grid.ColumnDefinitions.Add(new ColumnDefinition());
    int count = 0;
    for (int column = 0; column < size; column++)
        for (int row = 0; row < size; row++)
            Add(grid, row, column, count);

Add is used to setup the Buttons to input the pattern and will use the Method for Play when the event handler for Click is triggered and Layout will use Add to create the look-and-feel for the game.

Step 10

While still in the Class for Library.cs after the Comment of // Tick & New type in the following Methods:

private void Tick()
    if (_index <= _score)
        _playing = true;
        _index = 0;
        _playing = false;

public void New(Grid grid)
    _index = 0;
    _score = 0;
    _grid = grid;
    _over = false;
    _dialog = new(grid.XamlRoot, title);
    _values = Choose(0, 3, level);
    _timer = new DispatcherTimer()
        Interval = TimeSpan.FromMilliseconds(timer_duration)
    _timer.Tick += (object sender, object e) =>

Tick will display the pattern that needs to be duplicated using Set and New will setup and start a game.

Step 11

Within Solution Explorer for the Solution double-click on MainWindow.xaml to see the XAML for the Main Window.
Solution Explorer MainWindow.xaml

Step 12

In the XAML for MainWindow.xaml there will be some XAML for a StackPanel, this should be Removed:

<StackPanel Orientation="Horizontal" 
HorizontalAlignment="Center" VerticalAlignment="Center">
    <Button x:Name="myButton" Click="myButton_Click">Click Me</Button>

Step 13

While still in the XAML for MainWindow.xaml above </Window>, type in the following XAML:

        <Grid Margin="50" Name="Display" 
        VerticalAlignment="Center" Loaded="New"/>
    <CommandBar VerticalAlignment="Bottom">
        <AppBarButton Icon="Page2" Label="New" Click="New"/>

This XAML contains a Grid with a Viewbox which will Scale a Grid. It has a Loaded event handler for New which is also shared by the AppBarButton.

Step 14

Within Solution Explorer for the Solution select the arrow next to MainWindow.xaml then double-click on MainWindow.xaml.cs to see the Code for the Main Window.
Solution Explorer MainWindow.xaml.cs

Step 15

In the Code for MainWindow.xaml.cs there be a Method of myButton_Click(...) this should be Removed by removing the following:

private void myButton_Click(object sender, RoutedEventArgs e)
    myButton.Content = "Clicked";

Step 16

Once myButton_Click(...) has been removed, within the Constructor of public MainWindow() { ... } and below the line of this.InitializeComponent(); type in the following Code:

private readonly Library _library = new();

private void New(object sender, RoutedEventArgs e) =>

Here an Instance of Library is created then below this is the Method of New that will be used with Event Handler from the XAML, this Method uses Arrow Syntax with the => for an expression body which is useful when a Method only has one line.

Step 17

That completes the Windows App SDK application. In Visual Studio 2022 from the Toolbar select TouchGame (Package) to Start the application.
TouchGame (Package)

Step 18

Once running you can then select any Button then one of the Squares will be highlighted, select the correct one, then each time one more Square will be highlighted each turn, match the pattern to continue but if you get it wrong you lose, or you can select New to start a new game.

Touch Game Running and Output

Step 19

To Exit the Windows App SDK application, select the Close button from the top right of the application as that concludes this Tutorial for Windows App SDK from!
Close application