init branch

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

@@ -0,0 +1,14 @@
+<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="ButtonBaseBaseStyle.xaml"/>
+    </ResourceDictionary.MergedDictionaries>
+
+    <Style x:Key="SplitButtonBaseStyle" BasedOn="{StaticResource ButtonBaseBaseStyle}" TargetType="controls:SplitButton">
+        <Setter Property="Background" Value="{DynamicResource RegionBrush}"/>
+        
+    </Style>
+
+</ResourceDictionary>