chore: use file-scoped namespace

src/Shared/HandyControl_Shared/Tools/Converter/Boolean2StrConverter.cs

@@ -2,31 +2,30 @@
 using System.Globalization;
 using System.Windows.Data;
 
-namespace HandyControl.Tools.Converter
+namespace HandyControl.Tools.Converter;
+
+public class Boolean2StringConverter : IValueConverter
 {
-    public class Boolean2StringConverter : IValueConverter
+    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
     {
-        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        if (value is bool boolValue)
         {
-            if (value is bool boolValue)
+            if (parameter is string str)
             {
-                if (parameter is string str)
+                var arr = str.Split(';');
+                if (arr.Length > 1)
                 {
-                    var arr = str.Split(';');
-                    if (arr.Length > 1)
-                    {
-                        return boolValue ? arr[1] : arr[0];
-                    }
-                    return "";
+                    return boolValue ? arr[1] : arr[0];
                 }
                 return "";
             }
             return "";
         }
-
-        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
-        {
-            throw new NotSupportedException();
-        }
+        return "";
     }
-}
+
+    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+    {
+        throw new NotSupportedException();
+    }
+}