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

HandyControlDemo/ViewModel/Controls/StepBarDemoViewModel.cs

@@ -1,8 +1,6 @@
 using System;
-using System.Collections.Generic;
 using System.Linq;
 using System.Windows.Controls;
-using GalaSoft.MvvmLight;
 using GalaSoft.MvvmLight.CommandWpf;
 using HandyControl.Controls;
 using HandyControlDemo.Data;
@@ -10,26 +8,9 @@ using HandyControlDemo.Service;
 
 namespace HandyControlDemo.ViewModel
 {
-    public class StepBarDemoViewModel : ViewModelBase
+    public class StepBarDemoViewModel : DemoViewModelBase<StepBarDemoModel>
     {
-        /// <summary>
-        ///     数据列表
-        /// </summary>
-        private List<StepBarDemoModel> _dataList;
-
-        /// <summary>
-        ///     数据列表
-        /// </summary>
-        public List<StepBarDemoModel> DataList
-        {
-            get => _dataList;
-            set => Set(ref _dataList, value);
-        }
-
-        public StepBarDemoViewModel(DataService dataService)
-        {
-            DataList = dataService.GetStepBarDemoDataList();
-        }
+        public StepBarDemoViewModel(DataService dataService) => DataList = dataService.GetStepBarDemoDataList();
 
         /// <summary>
         ///     下一步