C# 由同一委托类型生成的每个事件是否都有'；谁是自己的多播代理？

如果我有类似于：

    static class Program
{
    public static delegate void TestHandler();
    public static event TestHandler TestEvent;
    public static event TestHandler TestEvent1;
    public static event TestHandler TestEvent2;


    static void Main(string[] args)
    {

        TestEvent += DoSomething1;
        TestEvent1 += DoSomething2;
        TestEvent2 += DoSomething3;

        Trigger();

        Console.ReadLine();
    }

    public static void Trigger()
    {
        TestEvent();
        TestEvent1();
        TestEvent2();
    }


    private static void DoSomething3()
    {
        Console.WriteLine("Something 3 was done");
    }

    private static void DoSomething2()
    {
        Console.WriteLine("Something 2 was done");
    }

    private static void DoSomething1()
    {
        Console.WriteLine("Something 1 was done");
    }

---

由相同类型生成的每个事件是否都有自己的多播委托？如何将每个事件的调用列表与相同的委托类型分开？

委托实际上是类。因此，在您的例子中，有一种类型是为
TestHandler
delegate创建的。该类有三个不同的实例

您可以在生成的IL代码中轻松看到这一点：


如您所见，有一个
TestHandler
类型，并且有三个该类型的字段。因此，它们共享相同的类型，但它们是完全独立的…
是的，每个
事件都有自己的多播委托支持字段。如果事件类型（因此字段类型）相同，则不会改变这一点

守则：

public delegate void TestHandler();

static class Program
{
    public static event TestHandler TestEvent;
    public static event TestHandler TestEvent1;
    public static event TestHandler TestEvent2;
}

或多或少意味着：

public delegate void TestHandler();

static class Program
{
    // backing fields with the same names:
    private static TestHandler TestEvent;
    private static TestHandler TestEvent1;
    private static TestHandler TestEvent2;

    // each event is really a pair of two "methods" (accessors)
    public static event TestHandler TestEvent
    {
        add
        {
            // smart code to access the private field in a safe way,
            // combining parameter 'value' into that
        }
        remove
        {
            // smart code to access the private field in a safe way,
            // taking out parameter 'value' from that
        }
    }
    public static event TestHandler TestEvent1
    {
        add
        {
            // smart code to access the private field in a safe way,
            // combining parameter 'value' into that
        }
        remove
        {
            // smart code to access the private field in a safe way,
            // taking out parameter 'value' from that
        }
    }
    public static event TestHandler TestEvent2
    {
        add
        {
            // smart code to access the private field in a safe way,
            // combining parameter 'value' into that
        }
        remove
        {
            // smart code to access the private field in a safe way,
            // taking out parameter 'value' from that
        }
    }
}

不能声明委托类型
静态
！您的代理类型与
System.Action
具有相同的签名和返回类型，因此您可以改用该类型。图中还有三个
private
字段（靠近顶部，用带S的“菱形”（表示
static
）显示），它们与事件（程序
底部的“三角形”）本身具有相同的名称。每个私有字段都是对包含自己调用列表的对象的引用。