Optimize and add detection for full line

Tetris/Views/GameWindow.xaml.cs

@@ -1,12 +1,10 @@
-using System;
-using System.Runtime.InteropServices;
-using System.Windows;
+using System.Runtime.InteropServices;
 using System.Windows.Input;
 using Tetris.ViewsModels;
 
 namespace Tetris.Views;
 
-public partial class GameWindow : Window
+public partial class GameWindow
 {
     private static readonly GameViewModel GameViewModel = new();
     
@@ -21,29 +19,25 @@ public partial class GameWindow : Window
     private static extern bool AttachConsole(int dwProcessId);
 
     private void UIElement_OnKeyDown(object sender, KeyEventArgs e)
+    {
+        switch (e.Key)
         {
             // If key is space
-        if (e.Key == Key.Space)
-        {
+            case Key.Space:
                 GameViewModel.Game.CurrentTetrominoe?.RotateRight();
-        }
-        
+                break;
             // If key is down
-        else if (e.Key == Key.Down)
-        {
+            case Key.Down:
                 GameViewModel.Game.CurrentTetrominoe?.GoDown();
-        }
-        
+                break;
             // If key is left
-        else if (e.Key == Key.Left)
-        {
+            case Key.Left:
                 GameViewModel.Game.CurrentTetrominoe?.GoLeft();
-        }
-        
+                break;
             // If key is right
-        else if (e.Key == Key.Right)
-        {
+            case Key.Right:
                 GameViewModel.Game.CurrentTetrominoe?.GoRight();
+                break;
         }
     }
 }

Tetris/Views/MainWindow.xaml.cs

@@ -8,7 +8,7 @@ namespace Tetris.Views;
 /// <summary>
 ///     Interaction logic for MainWindow.xaml
 /// </summary>
-public partial class MainWindow : Window
+public partial class MainWindow
 {
     public MainWindow()
     {

Tetris/ViewsModels/GameViewModel.cs

@@ -45,6 +45,7 @@ public class GameViewModel : INotifyPropertyChanged
     }
     
     public ImageSource Source => _writeableBitmap;
+    public ImageSource RightSource => _writeableBitmap;
 
     private void Render(object? sender, EventArgs eventArgs)
     {
@@ -92,5 +93,11 @@ public class GameViewModel : INotifyPropertyChanged
         {
             Game.PrintTetrominoe();
         }
+
+        if (Game.LineFull())
+        {
+            Game.ClearLine();
+            // TODO: Add score
+        }
     }
 }

Tetris/ViewsModels/ViewModel.cs

@@ -4,11 +4,10 @@ namespace Tetris.ViewsModels;
 
 public class ViewModel : INotifyPropertyChanged
 {
-    public event PropertyChangedEventHandler PropertyChanged;
+    public event PropertyChangedEventHandler? PropertyChanged;
 
     protected virtual void OnPropertyChanged(string propertyName)
     {
-        if (PropertyChanged != null)
-            PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
+        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
     }
 }