Full Code for save the presents wpf c# game –

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

using System.Windows.Threading; // add this for the timer

namespace Save_the_Presents_Game
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {

        int maxItem = 5; // max item integer set to 5
        int currentItems = 0; // current item integer set to 0

        Random r = new Random(); // new random class to generate random numbers

        int score = 0; // default score integer is 0
        int missed = 0; // default missed integer is 0

        DispatcherTimer GameTimer = new DispatcherTimer(); // make a new timer for this gam 
        List<Rectangle> itemstoremove = new List<Rectangle>(); // game new rectangle list called items to remove

        ImageBrush playerImage = new ImageBrush(); // new player image brush - will be used to show player image
        ImageBrush backgroundImage = new ImageBrush(); // new background image brush - will be used to show background

        public MainWindow()
        {
            InitializeComponent();

            // create the timer, add a drop item event and give it a 20 millisecond interval
            GameTimer.Tick += dropItems;
            GameTimer.Interval = TimeSpan.FromMilliseconds(20);
            GameTimer.Start();

            // load the images for background and player to the image brush class
            playerImage.ImageSource = new BitmapImage(new Uri("pack://application:,,,/images/netLeft.png"));
            backgroundImage.ImageSource = new BitmapImage(new Uri("pack://application:,,,/images/background.jpg"));

            // assign the pictures for the player object and canvas object
            player1.Fill = playerImage;
            myCanvas.Background = backgroundImage;
        }

        private void Canvas_MouseMove(object sender, MouseEventArgs e)
        {
            // Get the x and y coordinates of the mouse pointer.
            System.Windows.Point position = e.GetPosition(this);
            double pX = position.X;
            double pY = position.Y;

            // Sets the Height/Width of the circle to the mouse coordinates.
            Canvas.SetLeft(player1, pX - 10);

            // if the player is positioned less than 260 pixels
            // we will set the net to the left image

            if (Canvas.GetLeft(player1) < 260)
            {
                playerImage.ImageSource = new BitmapImage(new Uri("pack://application:,,,/images/netLeft.png"));
            }

            // if the olayer positioned more than 260 pixels
            // we will set the net to the right image
            if (Canvas.GetLeft(player1) > 260)
            {
                playerImage.ImageSource = new BitmapImage(new Uri("pack://application:,,,/images/netRight.png"));
            }
        }


        private void dropItems(object sender, EventArgs e)
        {
            ScoreText.Content = "Caught: " + score; // link score label to score integer
            missedText.Content = "Missed: " + missed; // link missed label to missed integer

            // if the current image is less than max item which is 5
            // if there is less than 5 items in the screen 

            if (currentItems < maxItem)
            {

                makePresents(); // run the make presents function
                currentItems++; // add 1 to the current items
                itemstoremove.Clear(); // clear the items to remove list
            }

            // now we need to tell the game what to do with the items thats on the screen e.g. Rectangles
            // run a loop to check how many rectangles there are on the screen and organise them in the x variable

            foreach (var x in myCanvas.Children.OfType<Rectangle>())
            {
                // check if x has a tag of drops
                if ((string)x.Tag == "drops")
                {
                    // if it does then do the following

                    int dropThis = r.Next(8, 20); // new integer called dropThis generates a random number between 8 and 20
                    // set the x's speed to drop this
                    Canvas.SetTop(x, Canvas.GetTop(x) + dropThis);

                    // make two new Rect objects link one to the player and one to the items
                    // this will be used to check for collision between the player and the presents
                    Rect items = new Rect(Canvas.GetLeft(x), Canvas.GetTop(x), x.Width, x.Height);
                    Rect playerObject = new Rect(Canvas.GetLeft(player1), Canvas.GetTop(player1), player1.Width, player1.Height);


                    //if player object collides with items

                    if (playerObject.IntersectsWith(items))
                    {
                        // add the item to the items to be removed list
                        itemstoremove.Add(x);
                        // deduct 1 from the current items list
                        currentItems--;

                        // add 1 to the score
                        score++;
                    }
                    else if (Canvas.GetTop(x) > 700)
                    {

                        // if the player missed the item and its gone passed 700 pixels from the main window
                        // add the item to the removed list
                        itemstoremove.Add(x);
                        // deduct 1 from the current items
                        currentItems--;
                        // add 1 to the missed integer
                        missed++;
                    }

                }


                // if the player missed more than 6 items
                if (missed > 6)
                {
                    // stop the main game timer
                    GameTimer.Stop();
                    // show a message box that says you lost click OK to try again
                    MessageBox.Show("You Lost" + Environment.NewLine + " Click OK to try again !");

                    // then run the reset game function
                    resetGame();
                }

            }

            // removing its from the scene
            // check how many rectangles are in the items move list
            // remove them from the list using the for each loop

            foreach (Rectangle y in itemstoremove)
            {
                myCanvas.Children.Remove(y);
            }
        }


        private void resetGame()
        {
            //restart the game with the current settings. 
            System.Diagnostics.Process.Start(Application.ResourceAssembly.Location);
            // This will go in the event handler for your button click.
            Application.Current.Shutdown();
            Environment.Exit(0);
        }

        private void makePresents()
        {
            ImageBrush presents = new ImageBrush(); // make a new image brush

            int i = r.Next(1, 6); // get a random number between 1 and 6

            // this switch statement will check what number comes back and assign a present according
            // for example if the number is 1 then it will give present 1 image 2 give present 2 and so on
            switch (i)
            {
                case 1:
                    presents.ImageSource = new BitmapImage(new Uri("pack://application:,,,/images/present_01.png"));
                    break;
                case 2:
                    presents.ImageSource = new BitmapImage(new Uri("pack://application:,,,/images/present_02.png"));
                    break;
                case 3:
                    presents.ImageSource = new BitmapImage(new Uri("pack://application:,,,/images/present_03.png"));
                    break;
                case 4:
                    presents.ImageSource = new BitmapImage(new Uri("pack://application:,,,/images/present_04.png"));
                    break;
                case 5:
                    presents.ImageSource = new BitmapImage(new Uri("pack://application:,,,/images/present_05.png"));
                    break;
                case 6:
                    presents.ImageSource = new BitmapImage(new Uri("pack://application:,,,/images/present_06.png"));
                    break;
            }

            // once the present  image is set we now can make a new rectangle for the presents
            // inside of this rectangle we set the height, width, tag and fill link to the presents image brush we created above
            Rectangle newRec = new Rectangle
            {
                Tag = "drops",
                Width = 50,
                Height = 50,
                Fill = presents,
            };

            // once the presents rectangle is created now, we can set it randomly on the canvas
            // the reason we have a * -1 end of the top location is because whatever number comes back we want to move the
            // presents off the screen so it can continue to drop down
            Canvas.SetTop(newRec, r.Next(60, 150) * -1);
            Canvas.SetLeft(newRec, r.Next(10, 450));

            // once the location is set now we can add it to the canvas
            myCanvas.Children.Add(newRec);
        }


    }
}