chore: use file-scoped namespace

src/Shared/HandyControl_Shared/Tools/Helper/SingleOpenHelper.cs

@@ -3,40 +3,39 @@ using System.Linq;
 using System.Windows.Media;
 using HandyControl.Controls;
 
-namespace HandyControl.Tools
+namespace HandyControl.Tools;
+
+/// <summary>
+///     该类可以为可视化元素提供单开的功能
+/// </summary>
+public class SingleOpenHelper
 {
+    private static readonly Dictionary<string, ISingleOpen> OpenDic = new();
+
     /// <summary>
-    ///     该类可以为可视化元素提供单开的功能
+    ///     根据指定的类型创建实例
     /// </summary>
-    public class SingleOpenHelper
+    /// <typeparam name="T"></typeparam>
+    /// <returns></returns>
+    public static T CreateControl<T>() where T : Visual, ISingleOpen, new()
     {
-        private static readonly Dictionary<string, ISingleOpen> OpenDic = new();
+        var typeStr = typeof(T).FullName;
 
-        /// <summary>
-        ///     根据指定的类型创建实例
-        /// </summary>
-        /// <typeparam name="T"></typeparam>
-        /// <returns></returns>
-        public static T CreateControl<T>() where T : Visual, ISingleOpen, new()
+        if (string.IsNullOrEmpty(typeStr)) return default;
+
+        var temp = new T();
+        if (!OpenDic.Keys.Contains(typeStr))
         {
-            var typeStr = typeof(T).FullName;
-
-            if (string.IsNullOrEmpty(typeStr)) return default;
-
-            var temp = new T();
-            if (!OpenDic.Keys.Contains(typeStr))
-            {
-                OpenDic.Add(typeStr, temp);
-                return temp;
-            }
-            var currentCtl = OpenDic[typeStr];
-            if (currentCtl.CanDispose)
-            {
-                currentCtl.Dispose();
-                OpenDic[typeStr] = temp;
-                return temp;
-            }
-            return default;
+            OpenDic.Add(typeStr, temp);
+            return temp;
         }
+        var currentCtl = OpenDic[typeStr];
+        if (currentCtl.CanDispose)
+        {
+            currentCtl.Dispose();
+            OpenDic[typeStr] = temp;
+            return temp;
+        }
+        return default;
     }
-}
+}