添加项目文件。

GroupLine.App/View/AppearanceTest/AppearanceTestIndex.xaml.cs

@@ -0,0 +1,15 @@
+using System.Windows.Controls;
+
+namespace GroupLine.App.View.AppearanceTest
+{
+    /// <summary>
+    /// AppearanceTestIndex.xaml 的交互逻辑
+    /// </summary>
+    public partial class AppearanceTestIndex : UserControl
+    {
+        public AppearanceTestIndex()
+        {
+            InitializeComponent();
+        }
+    }
+}