public int data { get; set; } Console.WriteLine("{0}",obj.data);

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication8
{
    class AAA
    {
        public int data { get; set; }
    }
    class Program
    {
        static void Main(string[] args)
        {
            AAA obj = new AAA();
            Console.WriteLine("{0}",obj.data);
        }
//        0
//请按任意键继续. . .
    }
}