chore: use file-scoped namespace

src/Shared/HandyControlDemo_Shared/UserControl/Controls/PropertyGridDemoCtl.xaml.cs

@@ -1,31 +1,30 @@
 using System.Windows;
 using HandyControlDemo.Data;
 
-namespace HandyControlDemo.UserControl
+namespace HandyControlDemo.UserControl;
+
+public partial class PropertyGridDemoCtl
 {
-    public partial class PropertyGridDemoCtl
+    public PropertyGridDemoCtl()
     {
-        public PropertyGridDemoCtl()
+        InitializeComponent();
+
+        DemoModel = new PropertyGridDemoModel
         {
-            InitializeComponent();
-
-            DemoModel = new PropertyGridDemoModel
-            {
-                String = "TestString",
-                Enum = Gender.Female,
-                Boolean = true,
-                Integer = 98,
-                VerticalAlignment = VerticalAlignment.Stretch
-            };
-        }
-
-        public static readonly DependencyProperty DemoModelProperty = DependencyProperty.Register(
-            "DemoModel", typeof(PropertyGridDemoModel), typeof(PropertyGridDemoCtl), new PropertyMetadata(default(PropertyGridDemoModel)));
-
-        public PropertyGridDemoModel DemoModel
-        {
-            get => (PropertyGridDemoModel) GetValue(DemoModelProperty);
-            set => SetValue(DemoModelProperty, value);
-        }
+            String = "TestString",
+            Enum = Gender.Female,
+            Boolean = true,
+            Integer = 98,
+            VerticalAlignment = VerticalAlignment.Stretch
+        };
     }
-}
+
+    public static readonly DependencyProperty DemoModelProperty = DependencyProperty.Register(
+        "DemoModel", typeof(PropertyGridDemoModel), typeof(PropertyGridDemoCtl), new PropertyMetadata(default(PropertyGridDemoModel)));
+
+    public PropertyGridDemoModel DemoModel
+    {
+        get => (PropertyGridDemoModel) GetValue(DemoModelProperty);
+        set => SetValue(DemoModelProperty, value);
+    }
+}