优化更新代码，添加界面功能并整合

WPFluent/Controls/ContextMenu/ContextMenuLoader.xaml.cs

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+
+
+
+/* This Code is based on a StackOverflow-Answer: https://stackoverflow.com/a/56736232/9759874 */
+
+using System.Reflection;
+using System.Windows.Threading;
+
+namespace WPFluent.Controls;
+
+/// <summary>
+/// Overwrites ContextMenu-Style for some UIElements (like RichTextBox) that don't take the default ContextMenu-Style by
+/// default. <para>The code inside this CodeBehind-Class forces this ContextMenu-Style on these UIElements through
+/// Reflection (because it is only accessible through Reflection it is also only possible through CodeBehind and not
+/// XAML)</para>
+/// </summary>
+public partial class ContextMenuLoader : ResourceDictionary
+{
+    /// <summary>
+    /// Initializes a new instance of the <see cref="ContextMenuLoader"/> class and registers editing styles defined in
+    /// "ContextMenu.xaml" with the <see cref="Dispatcher"/>.
+    /// </summary>
+    public ContextMenuLoader()
+    {
+        // Run OnResourceDictionaryLoaded asynchronously to ensure other ResourceDictionary are already loaded before adding new entries
+        _ = Dispatcher.CurrentDispatcher.BeginInvoke(DispatcherPriority.Normal, new Action(OnResourceDictionaryLoaded));
+    }
+
+    private void AddEditorContextMenuDefaultStyle(Assembly currentAssembly)
+    {
+        var editorContextMenuType = Type.GetType(
+            $"System.Windows.Documents.TextEditorContextMenu+EditorContextMenu, {currentAssembly}");
+
+        ResourceDictionary resourceDict = new()
+        {
+            Source = new Uri("pack://application:,,,/WPFluent;component/Controls/ContextMenu/ContextMenu.xaml"),
+        };
+
+        Style contextMenuStyle = (Style)resourceDict["UiContextMenu"];
+
+        if (editorContextMenuType is null || contextMenuStyle is null)
+        {
+            return;
+        }
+
+        var editorContextMenuStyle = new Style(editorContextMenuType, contextMenuStyle);
+        Add(editorContextMenuType, editorContextMenuStyle);
+    }
+
+    private void OnResourceDictionaryLoaded()
+    {
+        Assembly currentAssembly = typeof(Application).Assembly;
+
+        AddEditorContextMenuDefaultStyle(currentAssembly);
+    }
+}