fixed #632

src/Shared/HandyControl_Shared/Tools/Helper/ResourceHelper.cs

@@ -85,14 +85,22 @@ namespace HandyControl.Tools
         ///     get HandyControl theme
         /// </summary>
         /// <returns></returns>
-        public static ResourceDictionary GetTheme()
+        public static ResourceDictionary GetTheme(bool standalone = false)
         {
-            HcTheme ??= new ResourceDictionary
+            if (!standalone)
+            {
+                HcTheme ??= new ResourceDictionary
+                {
+                    Source = new Uri("pack://application:,,,/HandyControl;component/Themes/Theme.xaml")
+                };
+
+                return HcTheme;
+            }
+
+            return new ResourceDictionary
             {
                 Source = new Uri("pack://application:,,,/HandyControl;component/Themes/Theme.xaml")
             };
-
-            return HcTheme;
         }
     }
 }