chore: use file-scoped namespace

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

@@ -4,38 +4,37 @@ using System.Windows.Controls.Primitives;
 using System.Windows.Media;
 using HandyControl.Data;
 
-namespace HandyControl.Controls
+namespace HandyControl.Controls;
+
+public class ButtonGroup : ItemsControl
 {
-    public class ButtonGroup : ItemsControl
+    protected override bool IsItemItsOwnContainerOverride(object item) => item is Button or RadioButton or ToggleButton;
+
+    public static readonly DependencyProperty OrientationProperty = DependencyProperty.Register(
+        "Orientation", typeof(Orientation), typeof(ButtonGroup), new PropertyMetadata(default(Orientation)));
+
+    public Orientation Orientation
     {
-        protected override bool IsItemItsOwnContainerOverride(object item) => item is Button or RadioButton or ToggleButton;
+        get => (Orientation) GetValue(OrientationProperty);
+        set => SetValue(OrientationProperty, value);
+    }
 
-        public static readonly DependencyProperty OrientationProperty = DependencyProperty.Register(
-            "Orientation", typeof(Orientation), typeof(ButtonGroup), new PropertyMetadata(default(Orientation)));
+    public static readonly DependencyProperty LayoutProperty = DependencyProperty.Register(
+        "Layout", typeof(LinearLayout), typeof(ButtonGroup), new PropertyMetadata(LinearLayout.Uniform));
 
-        public Orientation Orientation
+    public LinearLayout Layout
+    {
+        get => (LinearLayout) GetValue(LayoutProperty);
+        set => SetValue(LayoutProperty, value);
+    }
+
+    protected override void OnRender(DrawingContext drawingContext)
+    {
+        var count = Items.Count;
+        for (var i = 0; i < count; i++)
         {
-            get => (Orientation) GetValue(OrientationProperty);
-            set => SetValue(OrientationProperty, value);
-        }
-
-        public static readonly DependencyProperty LayoutProperty = DependencyProperty.Register(
-            "Layout", typeof(LinearLayout), typeof(ButtonGroup), new PropertyMetadata(LinearLayout.Uniform));
-
-        public LinearLayout Layout
-        {
-            get => (LinearLayout) GetValue(LayoutProperty);
-            set => SetValue(LayoutProperty, value);
-        }
-
-        protected override void OnRender(DrawingContext drawingContext)
-        {
-            var count = Items.Count;
-            for (var i = 0; i < count; i++)
-            {
-                var item = (ButtonBase) Items[i];
-                item.Style = ItemContainerStyleSelector?.SelectStyle(item, this);
-            }
+            var item = (ButtonBase) Items[i];
+            item.Style = ItemContainerStyleSelector?.SelectStyle(item, this);
         }
     }
-}
+}