A A=new A();

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

namespace ConsoleApplication1
{
    class A
    {
        public A()
        {
            Console.WriteLine("public A()");
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            A A = new A();
        }
    }
}
/*
public A()
请按任意键继续. . . 
 */