add Watermark

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

@@ -0,0 +1,20 @@
+<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">
+
+    <Style x:Key="WatermarkBaseStyle" TargetType="controls:Watermark">
+        <Setter Property="MarkBrush" Value="{DynamicResource DarkMaskBrush}"/>
+        <Setter Property="Foreground" Value="{DynamicResource DarkMaskBrush}"/>
+        <Setter Property="Angle" Value="20"/>
+        <Setter Property="Template">
+            <Setter.Value>
+                <ControlTemplate TargetType="controls:Watermark">
+                    <Border Name="PART_Root">
+                        <ContentPresenter/>
+                    </Border>
+                </ControlTemplate>
+            </Setter.Value>
+        </Setter>
+    </Style>
+
+</ResourceDictionary>