diff --git a/src/MicaWPF.Core/Services/IThemeDictionaryService.cs b/src/MicaWPF.Core/Services/IThemeDictionaryService.cs
index 351e53e..6ae54aa 100644
--- a/src/MicaWPF.Core/Services/IThemeDictionaryService.cs
+++ b/src/MicaWPF.Core/Services/IThemeDictionaryService.cs
@@ -3,6 +3,7 @@
 // </copyright>
 
 using System.ComponentModel;
+using MicaWPF.Core.Enums;
 
 namespace MicaWPF.Core.Services;
 
@@ -31,4 +32,10 @@ public interface IThemeDictionaryService
     /// Force the current theme source to reload.
     /// </summary>
     void RefreshThemeSource();
+
+    /// <summary>
+    /// Gets the current theme from the loaded resource dictionnary.
+    /// </summary>
+    /// <returns>The current ap theme.</returns>
+    WindowsTheme GetCurrentResourcesTheme();
 }
\ No newline at end of file
diff --git a/src/MicaWPF.Core/Services/ThemeDictionaryService.cs b/src/MicaWPF.Core/Services/ThemeDictionaryService.cs
index cba2a4c..3a607e0 100644
--- a/src/MicaWPF.Core/Services/ThemeDictionaryService.cs
+++ b/src/MicaWPF.Core/Services/ThemeDictionaryService.cs
@@ -5,7 +5,9 @@
 using System.ComponentModel;
 using System.Runtime.CompilerServices;
 using System.Windows;
+using MicaWPF.Core.Enums;
 using MicaWPF.Core.Helpers;
+using MicaWPF.Core.Styles;
 
 namespace MicaWPF.Core.Services;
 
@@ -54,6 +56,22 @@ public void SetThemeSource(Uri source)
         }
     }
 
+    public WindowsTheme GetCurrentResourcesTheme()
+    {
+        var dictionnaries = Application.Current.Resources.MergedDictionaries;
+        foreach (var dictionary in dictionnaries)
+        {
+            if (dictionary is not ThemeDictionaryBase themeDictionary)
+            {
+                continue;
+            }
+
+            return themeDictionary.Theme;
+        }
+
+        return WindowsTheme.Auto;
+    }
+
     public void RefreshThemeSource()
     {
         if (_currentThemeSource is not null)
diff --git a/src/MicaWPF.Core/Services/ThemeService.cs b/src/MicaWPF.Core/Services/ThemeService.cs
index 564ef22..5c95d8b 100644
--- a/src/MicaWPF.Core/Services/ThemeService.cs
+++ b/src/MicaWPF.Core/Services/ThemeService.cs
@@ -25,7 +25,7 @@ public class ThemeService : IThemeService
 
     public ThemeService()
     {
-        ChangeTheme(WindowsTheme.Auto);
+        ChangeTheme(MicaWPFServiceUtility.ThemeDictionaryService.GetCurrentResourcesTheme());
         SetThemeAware();
     }
 
diff --git a/src/MicaWPF.Core/Styles/ThemeDictionaryBase.cs b/src/MicaWPF.Core/Styles/ThemeDictionaryBase.cs
index 6cef1a7..0a44f09 100644
--- a/src/MicaWPF.Core/Styles/ThemeDictionaryBase.cs
+++ b/src/MicaWPF.Core/Styles/ThemeDictionaryBase.cs
@@ -13,31 +13,32 @@ namespace MicaWPF.Core.Styles;
 [UsableDuringInitialization(true)]
 public abstract class ThemeDictionaryBase : ResourceDictionary
 {
-    private WindowsTheme? _theme = null;
     private WindowsTheme? _designModeTheme = null;
 
     public ThemeDictionaryBase()
     {
         if (DesignTimeHelper.IsDesignMode && !_designModeTheme.HasValue)
         {
-            SetTheme(WindowsTheme.Light);
+            SetTheme(Enums.WindowsTheme.Light);
             return;
         }
 
-        if(!_theme.HasValue)
+        if(!WindowsTheme.HasValue)
         {
-            SetTheme(WindowsTheme.Auto);
+            SetTheme(Enums.WindowsTheme.Auto);
         }
     }
 
+    public WindowsTheme? WindowsTheme { get; private set; } = null;
+
     public virtual string SourceLocation { get; } = string.Empty;
 
     public WindowsTheme Theme
     {
-        get => _theme!.Value;
+        get => WindowsTheme!.Value;
         set
         {
-            _theme = value;
+            WindowsTheme = value;
             if (!DesignTimeHelper.IsDesignMode)
             {
                 SetTheme(value);
@@ -62,7 +63,7 @@ protected void SetTheme(WindowsTheme value)
     {
         var themeName = value switch
         {
-            WindowsTheme.Dark => "MicaDark",
+            Enums.WindowsTheme.Dark => "MicaDark",
             _ => "MicaLight",
         };