optimized demo start-up speed

src/Shared/HandyControl_Shared/Controls/Window/BlurWindow.cs

@@ -20,12 +20,12 @@ namespace HandyControl.Controls
             EnableBlur(this);
         }
 
-        public static SystemVersionInfo SystemVersionInfo { get; set; }
-
         internal static void EnableBlur(Window window)
         {
-            if (SystemVersionInfo < SystemVersionInfo.Windows10 ||
-                SystemVersionInfo >= SystemVersionInfo.Windows10_1903)
+            var versionInfo = ConfigHelper.Instance.SystemVersionInfo;
+
+            if (versionInfo < SystemVersionInfo.Windows10 ||
+                versionInfo >= SystemVersionInfo.Windows10_1903)
             {
                 var colorValue = ResourceHelper.GetResource<uint>(ResourceToken.BlurGradientValue);
                 var color = ColorHelper.ToColor(colorValue);
@@ -37,7 +37,7 @@ namespace HandyControl.Controls
             var accentPolicy = new InteropValues.ACCENTPOLICY();
             var accentPolicySize = Marshal.SizeOf(accentPolicy);
 
-            accentPolicy.AccentState = SystemVersionInfo < SystemVersionInfo.Windows10_1809
+            accentPolicy.AccentState = versionInfo < SystemVersionInfo.Windows10_1809
                 ? InteropValues.ACCENTSTATE.ACCENT_ENABLE_BLURBEHIND
                 : InteropValues.ACCENTSTATE.ACCENT_ENABLE_ACRYLICBLURBEHIND;
 

src/Shared/HandyControl_Shared/Themes/Theme.cs

@@ -1,5 +1,4 @@
 using System;
-using System.Collections.ObjectModel;
 using System.Windows;
 using HandyControl.Data;
 using HandyControl.Tools;
@@ -8,7 +7,32 @@ namespace HandyControl.Themes
 {
     public class Theme : ResourceDictionary
     {
-        public Theme() => UpdateResource();
+        public Theme()
+        {
+            if (DesignerHelper.IsInDesignMode)
+            {
+                MergedDictionaries.Add(new ResourceDictionary
+                {
+                    Source = new Uri("pack://application:,,,/HandyControl;component/Themes/SkinDefault.xaml")
+                });
+                MergedDictionaries.Add(new ResourceDictionary
+                {
+                    Source = new Uri("pack://application:,,,/HandyControl;component/Themes/Theme.xaml")
+                });
+            }
+            else
+            {
+                UpdateResource();
+            }
+        }
+
+        private Uri _source;
+
+        public new Uri Source
+        {
+            get => DesignerHelper.IsInDesignMode ? null : _source;
+            set => _source = value;
+        }
 
         private SkinType _skin;
 
@@ -26,20 +50,19 @@ namespace HandyControl.Themes
 
         public string Name { get; set; }
 
-        public virtual Uri ThemeUri => new Uri("pack://application:,,,/HandyControl;component/Themes/Theme.xaml");
-
         public virtual ResourceDictionary GetSkin(SkinType skinType) => ResourceHelper.GetSkin(skinType);
 
+        public virtual ResourceDictionary GetTheme() => new ResourceDictionary
+        {
+            Source = new Uri("pack://application:,,,/HandyControl;component/Themes/Theme.xaml")
+        };
+
         private void UpdateResource()
         {
-            base.MergedDictionaries.Clear();
-            base.MergedDictionaries.Add(GetSkin(Skin));
-            base.MergedDictionaries.Add(new ResourceDictionary
-            {
-                Source = ThemeUri
-            });
+            if (DesignerHelper.IsInDesignMode) return;
+            MergedDictionaries.Clear();
+            MergedDictionaries.Add(GetSkin(Skin));
+            MergedDictionaries.Add(GetTheme());
         }
-
-        public new Collection<ResourceDictionary> MergedDictionaries => throw new NotSupportedException();
     }
 }

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

@@ -8,7 +8,6 @@ using System.Windows;
 using System.Windows.Markup;
 using System.Windows.Media.Animation;
 using System.Windows.Navigation;
-using HandyControl.Controls;
 using HandyControl.Data;
 using HandyControl.Properties.Langs;
 
@@ -38,7 +37,7 @@ namespace HandyControl.Tools
             }
         }
 
-        public void SetSystemVersionInfo(SystemVersionInfo info) => BlurWindow.SystemVersionInfo = info;
+        public SystemVersionInfo SystemVersionInfo { get; set; }
 
         public void SetLang(string lang)
         {
@@ -49,7 +48,7 @@ namespace HandyControl.Tools
 
         public void SetConfig(HandyControlConfig config)
         {
-            SetSystemVersionInfo(config.SystemVersionInfo);
+            SystemVersionInfo = config.SystemVersionInfo;
             SetLang(config.Lang);
             SetTimelineFrameRate(config.TimelineFrameRate);
         }
@@ -60,10 +59,10 @@ namespace HandyControl.Tools
         public void SetWindowDefaultStyle(object resourceKey = null)
         {
             var metadata = resourceKey == null
-                ? new FrameworkPropertyMetadata(Application.Current.FindResource(typeof(System.Windows.Window)))
+                ? new FrameworkPropertyMetadata(Application.Current.FindResource(typeof(Window)))
                 : new FrameworkPropertyMetadata(Application.Current.FindResource(resourceKey));
 
-            FrameworkElement.StyleProperty.OverrideMetadata(typeof(System.Windows.Window), metadata);
+            FrameworkElement.StyleProperty.OverrideMetadata(typeof(Window), metadata);
         }
 
         public void SetNavigationWindowDefaultStyle(object resourceKey = null)