C#函数重载

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

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            test();
            test(1);
            test("1");
            Console.ReadKey();
        }
        static void test()
        {
            Console.Write("1");
        }
        static void test(int i)
        {
            Console.Write("2");
        }
        static void test(string i)
        {
            Console.Write("3");
        }
    }
}