chore: use file-scoped namespace

src/Shared/HandyControl_Shared/Controls/Input/WatermarkTextBox.cs

@@ -1,36 +1,35 @@
 using System.Windows;
 
-namespace HandyControl.Controls
+namespace HandyControl.Controls;
+
+public class WatermarkTextBox : TextBox
 {
-    public class WatermarkTextBox : TextBox
+    #region Public Properties
+
+    #region Watermark
+
+    public static readonly DependencyProperty WatermarkProperty = DependencyProperty.Register(
+        "Watermark", typeof(object), typeof(WatermarkTextBox), new PropertyMetadata(default(object)));
+
+    public object Watermark
     {
-        #region Public Properties
+        get => GetValue(WatermarkProperty);
+        set => SetValue(WatermarkProperty, value);
+    }
 
-        #region Watermark
+    #endregion Watermark
 
-        public static readonly DependencyProperty WatermarkProperty = DependencyProperty.Register(
-            "Watermark", typeof(object), typeof(WatermarkTextBox), new PropertyMetadata(default(object)));
+    #endregion Public Properties
 
-        public object Watermark
+    protected override void OnGotFocus(RoutedEventArgs e)
+    {
+        base.OnGotFocus(e);
+        if (IsEnabled)
         {
-            get => GetValue(WatermarkProperty);
-            set => SetValue(WatermarkProperty, value);
-        }
-
-        #endregion Watermark
-
-        #endregion Public Properties
-
-        protected override void OnGotFocus(RoutedEventArgs e)
-        {
-            base.OnGotFocus(e);
-            if (IsEnabled)
+            if (!string.IsNullOrEmpty(Text))
             {
-                if (!string.IsNullOrEmpty(Text))
-                {
-                    Select(0, Text.Length);
-                }
+                Select(0, Text.Length);
             }
         }
     }
-}
+}