小编dro*_*dov的帖子

为什么以下代码不打印"Hello,World!"？

using System;

namespace Test
{
    public class Program
    {
        public static void Main(string[] args)
        {
            var a = new A();
            var b = new B(a);
            b.Evnt += val => Console.WriteLine(val);
            a.Do();
        }
    }

    public class A
    {
        public void Do()
        {
            Evnt("Hello, World!");   
        }

        public event Action<string> Evnt = v => {};   
    }

    public class B
    {

        public B(A a)
        {
            a.Evnt += Evnt; // this does not work
        }

        public event Action<string> Evnt = v => {};   

    } …