字段和局部变量的作用域冲突

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 namespace Wrox
 6 {
 7     class Program
 8     {
 9         static int j = 20;
10         static void Main(string[] args)
11         {
12             int j = 30;
13             Console.WriteLine(j);
14             Console.WriteLine(Program.j);
15             Console.ReadLine();
16             return;                     
17         }
18     }
19 }