now you can use ItemsSource on CoverView (for net>=4.5)

HandyControlDemo/ViewModel/Common/ComboBoxDemoViewModel.cs

@@ -1,25 +1,9 @@
-using System.Collections.Generic;
-using GalaSoft.MvvmLight;
-using HandyControlDemo.Service;
+using HandyControlDemo.Service;
 
 namespace HandyControlDemo.ViewModel
 {
-    public class ComboBoxDemoViewModel : ViewModelBase
+    public class ComboBoxDemoViewModel : DemoViewModelBase<string>
     {
-        /// <summary>
-        ///     数据列表
-        /// </summary>
-        private List<string> _dataList;
-
-        /// <summary>
-        ///     数据列表
-        /// </summary>
-        public List<string> DataList
-        {
-            get => _dataList;
-            set => Set(ref _dataList, value);
-        }
-
         public ComboBoxDemoViewModel(DataService dataService) => DataList = dataService.GetComboBoxDemoDataList();
     }
 }