diff --git a/src/CamBooth/CamBooth.App/Core/Logging/Logger.cs b/src/CamBooth/CamBooth.App/Core/Logging/Logger.cs
index 699b9a9..6285f93 100644
--- a/src/CamBooth/CamBooth.App/Core/Logging/Logger.cs
+++ b/src/CamBooth/CamBooth.App/Core/Logging/Logger.cs
@@ -6,6 +6,7 @@ namespace CamBooth.App.Core.Logging;
 public class Logger
 {
 	public event LoggingEventHandler? InfoLog;
+	public event LoggingEventHandler? ErrorLog;
 	public delegate void LoggingEventHandler(string text);
 	
 	public void Info(string message)
@@ -18,4 +19,14 @@ public class Logger
 		});
 
 	}
+	public void Error(string message)
+	{
+		Application.Current.Dispatcher.Invoke(() =>
+		{
+			message = DateTime.Now.ToString("dd.MM.yyyy HH:MM:ss", CultureInfo.InvariantCulture) + ": " + message;
+			ErrorLog?.Invoke(message);
+			Console.WriteLine(message);
+		});
+
+	}
 }
\ No newline at end of file
diff --git a/src/CamBooth/CamBooth.App/DebugConsole/DebugConsolePage.xaml.cs b/src/CamBooth/CamBooth.App/DebugConsole/DebugConsolePage.xaml.cs
index 83c58db..9cde885 100644
--- a/src/CamBooth/CamBooth.App/DebugConsole/DebugConsolePage.xaml.cs
+++ b/src/CamBooth/CamBooth.App/DebugConsole/DebugConsolePage.xaml.cs
@@ -1,4 +1,5 @@
 using System.Windows.Controls;
+using System.Windows.Media;
 
 using CamBooth.App.Core.Logging;
 
@@ -9,9 +10,18 @@ public partial class DebugConsolePage : Page
 	public DebugConsolePage(Logger logger)
 	{
 		logger.InfoLog += Logger_OnInfoLog;
+		logger.ErrorLog += Logger_OnErrorLog;
 		InitializeComponent();
 	}
 
+
+	private void Logger_OnErrorLog(string text)
+	{
+		this.tbDebugOutput.Text = this.tbDebugOutput.Text.Insert(0, text + "\n");
+		this.tbDebugOutput.Background = new SolidColorBrush(Colors.Tomato);
+	}
+
+
 	private void Logger_OnInfoLog(string text)
 	{
 		this.tbDebugOutput.Text = this.tbDebugOutput.Text.Insert(0, text + "\n");
diff --git a/src/CamBooth/CamBooth.App/MainWindow.xaml.cs b/src/CamBooth/CamBooth.App/MainWindow.xaml.cs
index 72dae0a..d158c5d 100644
--- a/src/CamBooth/CamBooth.App/MainWindow.xaml.cs
+++ b/src/CamBooth/CamBooth.App/MainWindow.xaml.cs
@@ -46,7 +46,7 @@ public partial class MainWindow : Window
 	{
 		//this.PicturePanel.Visibility = Visibility.Hidden;
 		//this.PicturePanel.Navigate(new PicturePanel(this._appSettings, this._logger));
-		Task.Run(()  => this._pictureGalleryService.LoadThumbnailsToCache(12));
+		this._pictureGalleryService.LoadThumbnailsToCache(12);
 		//this.DebugFrame.Navigate(new DebugConsolePage(this._logger));
 	}
 
diff --git a/src/CamBooth/CamBooth.App/PictureGallery/PictureGalleryService.cs b/src/CamBooth/CamBooth.App/PictureGallery/PictureGalleryService.cs
index 503640c..458edb1 100644
--- a/src/CamBooth/CamBooth.App/PictureGallery/PictureGalleryService.cs
+++ b/src/CamBooth/CamBooth.App/PictureGallery/PictureGalleryService.cs
@@ -19,16 +19,18 @@ public class PictureGalleryService
 	{
 		get
 		{
-			List<Image> tmp = new List<Image>();
-			foreach (var image in imageControls)
-			{
-				tmp.Add(image);
-			}
-			return tmp;
+			// List<Image> tmp = new List<Image>();
+			// foreach (var image in imageControls)
+			// {
+			// 	tmp.Add(image);
+			// }
+			// return tmp;
+			
+			return this.imageControls;
 		}
 	}
 
-	public List<Image> imageControls = new List<Image>();
+	private List<Image> imageControls = new List<Image>();
 
 
 	public PictureGalleryService(AppSettingsService appSettings, Logger logger)
@@ -70,7 +72,6 @@ public class PictureGalleryService
 		bitmap.BeginInit();
 		bitmap.UriSource = new Uri(filePath);
 		bitmap.DecodePixelWidth = maxWidth; // Größe des Thumbnails direkt beim Dekodieren festlegen
-		// bitmap.DecodePixelHeight = maxHeight;
 		bitmap.CacheOption = BitmapCacheOption.OnLoad;
 		bitmap.EndInit();
 		return bitmap;
diff --git a/src/CamBooth/CamBooth.App/PictureGallery/PicturePanel.xaml.cs b/src/CamBooth/CamBooth.App/PictureGallery/PicturePanel.xaml.cs
index b44a907..ba324fa 100644
--- a/src/CamBooth/CamBooth.App/PictureGallery/PicturePanel.xaml.cs
+++ b/src/CamBooth/CamBooth.App/PictureGallery/PicturePanel.xaml.cs
@@ -10,7 +10,7 @@ using Image = Wpf.Ui.Controls.Image;
 
 namespace CamBooth.App.PictureGallery;
 
-public partial class PicturePanel : Page
+public partial class PicturePanel : Page, IDisposable
 {
 	private readonly AppSettingsService _appSettingsService;
 
@@ -37,7 +37,7 @@ public partial class PicturePanel : Page
 		}
 		catch (Exception e)
 		{
-			this._logger.Info(e.Message);
+			this._logger.Error(e.Message);
 		}
 	}
 
@@ -46,7 +46,17 @@ public partial class PicturePanel : Page
 	{
 		foreach (Image ctl in this._pictureGalleryService.ImageControls)
 		{
-			this.PicturesPanel.Children.Add(ctl);
+			if(!this.PicturesPanel.Children.Contains(ctl))
+			{
+				this.PicturesPanel.Children.Add(ctl);
+			}
 		}
 	}
+
+
+	/// <summary>Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.</summary>
+	public void Dispose()
+	{
+		this.PicturesPanel.Children.Clear();
+	}
 }
\ No newline at end of file