Update

View/AppDataFilePage.xaml

@@ -8,7 +8,10 @@
         <VerticalStackLayout
             Padding="30,0"
             Spacing="25">
-            
+            <Label Text="Zawartość, która jest zapisywana w plikach aplikacji:" />
+            <Entry Text="{Binding AppDataFileContent}" />
+            <Button Text="Załaduj dane" Command="{Binding LoadAppDataFileCmd}" />
+            <Button Text="Zapisz dane" Command="{Binding SaveAppDataFileCmd}" />
         </VerticalStackLayout>
     </ScrollView>
 

View/AppDataFilePage.xaml.cs

@@ -1,10 +1,14 @@
+using FileReadAndWrite.Service;
+using FileReadAndWrite.ViewModel;
+
 namespace FileReadAndWrite.View
 {
     public partial class AppDataFilePage : ContentPage
     {
-        public AppDataFilePage()
+        public AppDataFilePage(FileService fileService)
         {
             InitializeComponent();
+            BindingContext = new AppDataFilePageVM(fileService);
         }
     }
 }

View/RawFilePage.xaml.cs

@@ -1,31 +1,12 @@
-using System.ComponentModel;
-using System.Windows.Input;
 using FileReadAndWrite.Service;
+using FileReadAndWrite.ViewModel;
 
 namespace FileReadAndWrite.View;
 
 public partial class RawFilePage : ContentPage {
-    private readonly FileService _fileService;
-    private string _rawFileContent = "";
-    public string RawFileContent { 
-        get => _rawFileContent; 
-        set {
-            _rawFileContent = value;
-            OnPropertyChanged(nameof(RawFileContent));
-        } 
-    }
-
-    public ICommand LoadRawFileCmd { get; }
-
     public RawFilePage(FileService fileService) {
         InitializeComponent();
-        _fileService = fileService;
 
-        BindingContext = this;
-        LoadRawFileCmd = new Command(async () => await LoadRawFile());
-    }
-
-    public async Task LoadRawFile(){
-        RawFileContent = await _fileService.LoadAsset("data.txt");
+        BindingContext = new RawFilePageVM(fileService);
     }
 }