support for .NET framework 3.5

Still have bugs

Net35/HandyControl_Net35/Themes/Styles/SearchBar.xaml

@@ -0,0 +1,15 @@
+<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+                    xmlns:controls="clr-namespace:HandyControl.Controls">
+
+    <ResourceDictionary.MergedDictionaries>
+        <ResourceDictionary Source="Base/SearchBarBaseStyle.xaml"/>
+    </ResourceDictionary.MergedDictionaries>
+
+    <Style BasedOn="{StaticResource SearchBarBaseStyle}" TargetType="controls:SearchBar"/>
+
+    <Style x:Key="SearchBarExtend" BasedOn="{StaticResource SearchBarExtendBaseStyle}" TargetType="controls:SearchBar"/>
+
+    <Style x:Key="SearchBarPlus" BasedOn="{StaticResource SearchBarPlusBaseStyle}" TargetType="controls:SearchBar"/>
+
+</ResourceDictionary>