Adjust project structure

src/Shared/HandyControl_Shared/Controls/Attach/BackgroundSwitchElement.cs

@@ -0,0 +1,22 @@
+using System.Windows;
+using System.Windows.Media;
+
+namespace HandyControl.Controls
+{
+    public class BackgroundSwitchElement
+    {
+        public static readonly DependencyProperty MouseHoverBackgroundProperty = DependencyProperty.RegisterAttached(
+            "MouseHoverBackground", typeof(Brush), typeof(BackgroundSwitchElement), new FrameworkPropertyMetadata(Brushes.Transparent, FrameworkPropertyMetadataOptions.Inherits));
+
+        public static void SetMouseHoverBackground(DependencyObject element, Brush value) => element.SetValue(MouseHoverBackgroundProperty, value);
+
+        public static Brush GetMouseHoverBackground(DependencyObject element) => (Brush)element.GetValue(MouseHoverBackgroundProperty);
+
+        public static readonly DependencyProperty MouseDownBackgroundProperty = DependencyProperty.RegisterAttached(
+            "MouseDownBackground", typeof(Brush), typeof(BackgroundSwitchElement), new FrameworkPropertyMetadata(Brushes.Transparent, FrameworkPropertyMetadataOptions.Inherits));
+
+        public static void SetMouseDownBackground(DependencyObject element, Brush value) => element.SetValue(MouseDownBackgroundProperty, value);
+
+        public static Brush GetMouseDownBackground(DependencyObject element) => (Brush)element.GetValue(MouseDownBackgroundProperty);
+    }
+}