C# Code: 
1  string jsonStr = "[{\"id\":\"815bb899-8d70-4745-b799-7e68840a2b34\",\"UserInfo\":{\"Name\":\"李四\",\"Age\":23}},{\"id\":\"815bb899-8d70-4745-b799-7e68840a2b34\",\"UserInfo\":{\"Name\":\"王五\",\"Age\":25}}]";
 2             List<User> userlist = JsonToList<User>(jsonStr);
 3 
 4  // 遍历list获取UserInfo对象的任意属性。
 5 
 6  
 7   public List<T> JsonToList<T>(string jsonStr)
 8         {
               if(jsonStr==null)return default(T);
 9             JavaScriptSerializer js = new JavaScriptSerializer();
10             List<T> t = (List<T>)js.Deserialize(jsonStr, typeof(List<T>));
11 
12             return t;
13 
14         }
15 
16 
17  public class User 
18         {
19             public string Id { get; set;}
20 
21             public UserInfo UserInfo { get; set; }
22            
23         }
24 
25         public class UserInfo 
26         {
27             public string Name { get; set; }
28 
29             public int Age { get; set; }
30         }
  //仅供参考

1      foreach (User user1 in userlist)
2             {
3                 User user = new User();
4                 user.UserInfo.Name = user1.UserInfo.Name;
5                 user.UserInfo.Age = user1.UserInfo.Age;
6             }