add Drawer demo

src/Shared/HandyControlDemo_Shared/Data/Model/DemoInfoModel.cs

@@ -0,0 +1,34 @@
+using System.Collections.Generic;
+using GalaSoft.MvvmLight;
+
+namespace HandyControlDemo.Data
+{
+    public class DemoInfoModel : ViewModelBase
+    {
+        private string _title;
+
+        public string Title
+        {
+            get => _title;
+#if netle40
+            set => Set(nameof(Title), ref _title, value);
+#else
+            set => Set(ref _title, value);
+#endif
+        }
+
+        private int _selectedIndex = -1;
+
+        public int SelectedIndex
+        {
+            get => _selectedIndex;
+#if netle40
+            set => Set(nameof(SelectedIndex), ref _selectedIndex, value);
+#else
+            set => Set(ref _selectedIndex, value);
+#endif   
+        }
+
+        public IList<DemoItemModel> DemoItemList { get; set; }
+    }
+}

src/Shared/HandyControlDemo_Shared/Data/Model/DemoItemModel.cs

@@ -0,0 +1,13 @@
+namespace HandyControlDemo.Data
+{
+    public class DemoItemModel
+    {
+        public string Name { get; set; }
+
+        public string TargetCtlName { get; set; }
+
+        public string ImageName { get; set; }
+
+        public bool IsNew { get; set; }
+    }
+}