add more detailed examples of pagination

HandyControlDemo/ViewModel/ViewModelLocator.cs

@@ -21,6 +21,7 @@ namespace HandyControlDemo.ViewModel
             SimpleIoc.Default.Register<WindowDemoViewModel>();
             SimpleIoc.Default.Register<ContributorsViewModel>();
             SimpleIoc.Default.Register<StepBarDemoViewModel>();
+            SimpleIoc.Default.Register<PaginationDemoViewModel>();
         }
 
         public static ViewModelLocator Instance => new Lazy<ViewModelLocator>(() =>
@@ -42,6 +43,8 @@ namespace HandyControlDemo.ViewModel
 
         public StepBarDemoViewModel StepBarDemo => ServiceLocator.Current.GetInstance<StepBarDemoViewModel>();
 
+        public PaginationDemoViewModel PaginationDemo => ServiceLocator.Current.GetInstance<PaginationDemoViewModel>();
+
         #endregion
     }
 }