adjusted project structure

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

@@ -0,0 +1,26 @@
+using System.Collections.Generic;
+using GalaSoft.MvvmLight;
+
+namespace HandyControlDemo.ViewModel
+{
+    public class DemoViewModelBase<T> : ViewModelBase
+    {
+        /// <summary>
+        ///     数据列表
+        /// </summary>
+        private IList<T> _dataList;
+
+        /// <summary>
+        ///     数据列表
+        /// </summary>
+        public IList<T> DataList
+        {
+            get => _dataList;
+#if NET40
+            set => Set(nameof(DataList), ref _dataList, value);
+#else
+            set => Set(ref _dataList, value);
+#endif       
+        }
+    }
+}