Improve the performance of merged ResourceDictionaries

src/Shared/HandyControl_Shared/Themes/Styles/Base/TextBlockBaseStyle.xaml

@@ -1,8 +1,9 @@
 <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
-                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+                    xmlns:themes="clr-namespace:HandyControl.Themes">
 
     <ResourceDictionary.MergedDictionaries>
-        <ResourceDictionary Source="../../Basic/Fonts.xaml"/>
+        <themes:SharedResourceDictionary Source="pack://application:,,,/HandyControl;component/Themes/Basic/Fonts.xaml"/>
     </ResourceDictionary.MergedDictionaries>
 
     <Style x:Key="TextBlockBaseStyle" TargetType="TextBlock">