improve stepbar

HandyControlDemo/ViewModel/ViewModelLocator.cs

@@ -20,6 +20,7 @@ namespace HandyControlDemo.ViewModel
             SimpleIoc.Default.Register<ComboBoxDemoViewModel>();
             SimpleIoc.Default.Register<WindowDemoViewModel>();
             SimpleIoc.Default.Register<ContributorsViewModel>();
+            SimpleIoc.Default.Register<StepBarDemoViewModel>();
         }
 
         public static ViewModelLocator Instance => new Lazy<ViewModelLocator>(() =>
@@ -39,6 +40,8 @@ namespace HandyControlDemo.ViewModel
 
         public ContributorsViewModel ContributorsView => ServiceLocator.Current.GetInstance<ContributorsViewModel>();
 
+        public StepBarDemoViewModel StepBarDemo => ServiceLocator.Current.GetInstance<StepBarDemoViewModel>();
+
         #endregion
     }
 }