using System;
using System.Threading;

public static class Program{

    public static void Main(){

        Timer t = new Timer(TimerCallback,null,0,2000);
        
        Console.ReadLine();
    
    }
    
    private static void TimerCallback(Object obj){
        Console.WriteLine("In TimerClallback : " DateTime.Now);
        //假装此时执行了GC
        //出于演示目的,强制执行一次辣鸡回收
        GC.Collect();
    }

运行可执行文件,TimerCallback方法江北调用几次?
Why?

[0]Jeffrey Richter. CLR via C#[M]. 第4版. 清华大学出版社.