Adjust project structure

src/Shared/HandyControlDemo_Shared/ViewModel/DemoViewModelBase!1.cs

@@ -16,7 +16,11 @@ namespace HandyControlDemo.ViewModel
         public IList<T> DataList
         {
             get => _dataList;
+#if netle40
+            set => Set(nameof(DataList), ref _dataList, value);
+#else
             set => Set(ref _dataList, value);
+#endif       
         }
     }
 }