theme switch

src/Shared/HandyControlDemo_Shared/App.xaml.cs

@@ -9,7 +9,6 @@ using System.Runtime;
 using System.Threading;
 using System.Windows;
 using HandyControl.Data;
-using HandyControl.Themes;
 using HandyControl.Tools;
 using HandyControlDemo.Data;
 using HandyControlDemo.Tools;
@@ -91,7 +90,6 @@ namespace HandyControlDemo
 
         internal void UpdateSkin(SkinType skin)
         {
-            SharedResourceDictionary.SharedDictionaries.Clear();
             var skins0 = Resources.MergedDictionaries[0];
             skins0.MergedDictionaries.Clear();
             skins0.MergedDictionaries.Add(ResourceHelper.GetSkin(skin));