using System;

namespace ConsoleApplication7
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine(typeof(Delegate) == typeof(MulticastDelegate));
        }
    }
}

delegate int D();

C>>delegate int D();
C>>

D d = a;
d+=b;
d+=c;

int res = d();

C>D d = a;
C>d+=b;
C>d+=c;

C>int res = d();
C>

Ecma-334

22.3 Delegate invocation

Invocation of a delegate instance whose invocation list contains multiple entries, proceeds by invoking each
of the methods in the invocation list, synchronously, in order. Each method so called is passed the same set
of arguments as was given to the delegate instance. If such a delegate invocation includes reference
parameters (§17.5.1.2), each method invocation will occur with a reference to the same variable; changes to
that variable by one method in the invocation list will be visible to methods further down the invocation list.
If the delegate invocation includes output parameters or a return value, their final value will come from the
invocation of the last delegate in the list. If an exception occurs during processing of the invocation of such a
delegate, and that exception is not caught within the method that was invoked, the search for an exception
catch clause continues in the method that called the delegate, and any methods further down the invocation
list are not invoked.