now hc styles can be referenced in window.resource

by the way, supported multiple themes at the same time, It may be related to #574

src/Shared/HandyControl_Shared/Controls/Other/Gravatar.cs

@@ -45,7 +45,7 @@ namespace HandyControl.Controls
                 {
                     Stretch = Stretch.UniformToFill
                 }
-                : ResourceHelper.GetResource<Brush>("SecondaryRegionBrush");
+                : ResourceHelper.GetResourceInternal<Brush>("SecondaryRegionBrush");
         }
 
         public ImageSource Source

src/Shared/HandyControl_Shared/Controls/Other/Pagination.cs

@@ -385,7 +385,7 @@ namespace HandyControl.Controls
         {
             return new RadioButton
             {
-                Style = ResourceHelper.GetResource<Style>(ResourceToken.PaginationButtonStyle),
+                Style = ResourceHelper.GetResourceInternal<Style>(ResourceToken.PaginationButtonStyle),
                 Content = page.ToString()
             };
         }

src/Shared/HandyControl_Shared/Controls/Other/TransitioningContentControl.cs

@@ -55,7 +55,7 @@ namespace HandyControl.Controls
             }
             else if (Application.Current != null)
             {
-                ResourceHelper.GetResource<Storyboard>($"{TransitionMode.ToString()}Transition")?.Begin(_contentPresenter);
+                ResourceHelper.GetResourceInternal<Storyboard>($"{TransitionMode.ToString()}Transition")?.Begin(_contentPresenter);
             }
         }