support for .NET framework 3.5

Still have bugs

Net35/HandyControl_Net35/Themes/Styles/Base/TextBlockBaseStyle.xaml

@@ -0,0 +1,19 @@
+<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+
+    <ResourceDictionary.MergedDictionaries>
+        <ResourceDictionary Source="../../Basic/Fonts.xaml"/>
+    </ResourceDictionary.MergedDictionaries>
+
+    <Style x:Key="TextBlockBaseStyle" TargetType="TextBlock">
+        <Setter Property="VerticalAlignment" Value="Center"/>
+        <Setter Property="HorizontalAlignment" Value="Center"/>
+        <Setter Property="Foreground" Value="{DynamicResource PrimaryTextBrush}"/>
+        <Setter Property="FontSize" Value="{StaticResource TextFontSize}"/>
+    </Style>
+
+    <Style x:Key="TextBlockBoldBaseStyle" BasedOn="{StaticResource TextBlockBaseStyle}" TargetType="TextBlock">
+        <Setter Property="FontWeight" Value="Bold"/>
+    </Style>
+
+</ResourceDictionary>