diff --git a/Maui.DataGrid.Sample/Models/Streak.cs b/Maui.DataGrid.Sample/Models/Streak.cs
index c17d066..d1b7c68 100644
--- a/Maui.DataGrid.Sample/Models/Streak.cs
+++ b/Maui.DataGrid.Sample/Models/Streak.cs
@@ -1,6 +1,6 @@
 namespace Maui.DataGrid.Sample.Models;
 
-public class Streak : IComparable
+internal sealed class Streak : IComparable
 {
     public GameResult Result { get; set; }
 
@@ -64,7 +64,7 @@ public int CompareTo(object? obj)
     /// <inheritdoc/>
     public override string ToString()
     {
-        return $"{Enum.GetName(typeof(GameResult), Result)} {NumStreak}";
+        return $"{Enum.GetName(Result)} {NumStreak}";
     }
 
     /// <inheritdoc/>
diff --git a/Maui.DataGrid.Sample/Models/Team.cs b/Maui.DataGrid.Sample/Models/Team.cs
index 5779f1d..3c6c2e1 100644
--- a/Maui.DataGrid.Sample/Models/Team.cs
+++ b/Maui.DataGrid.Sample/Models/Team.cs
@@ -1,6 +1,6 @@
 namespace Maui.DataGrid.Sample.Models;
 
-public class Team
+internal sealed class Team
 {
     public required string Name { get; set; }
 
diff --git a/Maui.DataGrid.Sample/SettingsPopup.xaml.cs b/Maui.DataGrid.Sample/SettingsPopup.xaml.cs
index a6a3819..8d38ae2 100644
--- a/Maui.DataGrid.Sample/SettingsPopup.xaml.cs
+++ b/Maui.DataGrid.Sample/SettingsPopup.xaml.cs
@@ -9,7 +9,7 @@ public partial class SettingsPopup
 {
     private readonly MainViewModel _viewModel;
 
-    public SettingsPopup(MainViewModel viewModel)
+    internal SettingsPopup(MainViewModel viewModel)
     {
         InitializeComponent();
         _viewModel = viewModel;
diff --git a/Maui.DataGrid.Sample/ViewModels/MainViewModel.cs b/Maui.DataGrid.Sample/ViewModels/MainViewModel.cs
index 830e702..5044a68 100644
--- a/Maui.DataGrid.Sample/ViewModels/MainViewModel.cs
+++ b/Maui.DataGrid.Sample/ViewModels/MainViewModel.cs
@@ -7,7 +7,7 @@ namespace Maui.DataGrid.Sample.ViewModels;
 using Maui.DataGrid.Sample.Models;
 using Maui.DataGrid.Sample.Utils;
 
-public class MainViewModel : ViewModelBase
+internal sealed class MainViewModel : ViewModelBase
 {
     public MainViewModel()
     {
diff --git a/Maui.DataGrid.Sample/ViewModels/ViewModelBase.cs b/Maui.DataGrid.Sample/ViewModels/ViewModelBase.cs
index 26653e3..56d1fb5 100644
--- a/Maui.DataGrid.Sample/ViewModels/ViewModelBase.cs
+++ b/Maui.DataGrid.Sample/ViewModels/ViewModelBase.cs
@@ -5,7 +5,7 @@ namespace Maui.DataGrid.Sample.ViewModels;
 using System.Runtime.CompilerServices;
 using System.Windows.Input;
 
-public abstract class ViewModelBase : INotifyPropertyChanged
+internal abstract class ViewModelBase : INotifyPropertyChanged
 {
     private readonly Dictionary<string, object?> _properties = [];