添加项目文件。

GroupLine.App/ViewModel/ItemMenu.cs

@@ -0,0 +1,28 @@
+using MaterialDesignThemes.Wpf;
+using System.Collections.Generic;
+using System.Windows.Controls;
+
+namespace GroupLine.App.ViewModel
+{
+    public class ItemMenu
+    {
+        public ItemMenu(string header, List<SubItem> subItems, PackIconKind icon)
+        {
+            Header = header;
+            SubItems = subItems;
+            Icon = icon;
+        }
+
+        public ItemMenu(string header, UserControl screen, PackIconKind icon)
+        {
+            Header = header;
+            Screen = screen;
+            Icon = icon;
+        }
+
+        public string Header { get; private set; }
+        public PackIconKind Icon { get; private set; }
+        public List<SubItem> SubItems { get; private set; }
+        public UserControl Screen { get; private set; }
+    }
+}