考虑下面的例子：

class Program
{
    static void Main(string[] args)
    {
        Test1();
        Test2();
    }

    public static void Test1()
    {
        Action a = () => Console.WriteLine("A");
        Action b = () => Console.WriteLine("B");

        Action c = a + b;
        c();
    }

    public static void Test2()
    {
        Action a = () => Console.WriteLine("A");
        Action b = () => Console.WriteLine("B");

        Action c = (Action)MulticastDelegate.Combine(a, b);
        c();
    }
}

然后用ILSpy看着它：

Then looking at it with ILSpy:

internal class Program
{
    private static void Main(string[] args)
    {
        Program.Test1();
        Program.Test2();
    }
    public static void Test1()
    {
        Action a = delegate
        {
            Console.WriteLine("A");
        };
        Action b = delegate
        {
            Console.WriteLine("B");
        };
        Action c = (Action)Delegate.Combine(a, b);
        c();
    }
    public static void Test2()
    {
        Action a = delegate
        {
            Console.WriteLine("A");
        };
        Action b = delegate
        {
            Console.WriteLine("B");
        };
        Action c = (Action)Delegate.Combine(a, b);
        c();
    }
}

似乎他们做同样的事情，只是C＃是提供在第一次测试的一些语法糖。

Seems that they do the exact same thing, just C# is providing some syntactic sugar in the first test.