chore: use file-scoped namespace

src/Shared/HandyControl_Shared/Controls/Button/ContextMenuToggleButton.cs

@@ -2,30 +2,29 @@
 using System.Windows.Controls.Primitives;
 
 
-namespace HandyControl.Controls
-{
-    /// <summary>
-    ///     带上下文菜单的切换按钮
-    /// </summary>
-    public class ContextMenuToggleButton : ToggleButton
-    {
-        public ContextMenu Menu { get; set; }
+namespace HandyControl.Controls;
 
-        protected override void OnClick()
+/// <summary>
+///     带上下文菜单的切换按钮
+/// </summary>
+public class ContextMenuToggleButton : ToggleButton
+{
+    public ContextMenu Menu { get; set; }
+
+    protected override void OnClick()
+    {
+        base.OnClick();
+        if (Menu != null)
         {
-            base.OnClick();
-            if (Menu != null)
+            if (IsChecked == true)
             {
-                if (IsChecked == true)
-                {
-                    Menu.PlacementTarget = this;
-                    Menu.IsOpen = true;
-                }
-                else
-                {
-                    Menu.IsOpen = false;
-                }
+                Menu.PlacementTarget = this;
+                Menu.IsOpen = true;
+            }
+            else
+            {
+                Menu.IsOpen = false;
             }
         }
     }
-}
+}