support for .NET framework 3.5

Still have bugs

Net35/HandyControlDemo_Net35/Data/Model/ContributorModel.cs

@@ -0,0 +1,21 @@
+
+namespace HandyControlDemo.Data
+{
+    public class ContributorModel
+    {
+        public string UserName { get; set; }
+
+        public string Link { get; set; }
+
+        public string AvatarUri { get; set; }
+    }
+
+    public class ContributorWebModel
+    {
+        public string login { get; set; }
+
+        public string html_url { get; set; }
+
+        public string avatar_url { get; set; }
+    }
+}