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");
}
}
}