chore: use file-scoped namespace

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

@@ -5,29 +5,28 @@ using System.Windows.Media;
 using HandyControl.Controls;
 using HandyControl.Data;
 
-namespace HandyControlDemo.UserControl
+namespace HandyControlDemo.UserControl;
+
+public partial class ScreenshotDemoCtl : IDisposable
 {
-    public partial class ScreenshotDemoCtl : IDisposable
+    public ScreenshotDemoCtl()
     {
-        public ScreenshotDemoCtl()
-        {
-            InitializeComponent();
-            Screenshot.Snapped += Screenshot_Snapped;
-        }
-
-        private void Screenshot_Snapped(object sender, FunctionEventArgs<ImageSource> e)
-        {
-            new HandyControl.Controls.Window
-            {
-                Content = new Image
-                {
-                    Source = e.Info,
-                    Stretch = Stretch.None
-                },
-                WindowStartupLocation = WindowStartupLocation.CenterScreen
-            }.ShowDialog();
-        }
-
-        public void Dispose() => Screenshot.Snapped -= Screenshot_Snapped;
+        InitializeComponent();
+        Screenshot.Snapped += Screenshot_Snapped;
     }
-}
+
+    private void Screenshot_Snapped(object sender, FunctionEventArgs<ImageSource> e)
+    {
+        new HandyControl.Controls.Window
+        {
+            Content = new Image
+            {
+                Source = e.Info,
+                Stretch = Stretch.None
+            },
+            WindowStartupLocation = WindowStartupLocation.CenterScreen
+        }.ShowDialog();
+    }
+
+    public void Dispose() => Screenshot.Snapped -= Screenshot_Snapped;
+}