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   源码介绍

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
    class PrivateField
    {
        public delegate bool ReturnBoolHandler(string info);
        public delegate void TestHandler(string msg);
        public event ReturnBoolHandler ReturnBoolEvent;
        public event TestHandler TestEvent;

    }
    class Program
    {
        public static void s_TestEvent(string msg)
        {
            Console.WriteLine(msg);
        }

        static void Main(string[] args)
        {
            Assembly ass = Assembly.Load("ConsoleApplication1");

            object structInstance = ass.CreateInstance("ConsoleApplication1.PrivateField");

            Type structType = structInstance.GetType();


            EventInfo eventInfo = structType.GetEvent("TestEvent", BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Public | BindingFlags.Static);

            Type tDelegate = eventInfo.EventHandlerType;

            MethodInfo miHandler = typeof(Program).GetMethod("s_TestEvent", BindingFlags.Public | BindingFlags.Static);



            Delegate d = Delegate.CreateDelegate(tDelegate, miHandler);

            MethodInfo miAddHandler = eventInfo.GetAddMethod();

            object[] addHandlerArgs = { d };

            miAddHandler.Invoke(structInstance, addHandlerArgs);

            FieldInfo _Field = structType.GetField("TestEvent", BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Public | BindingFlags.Static);

            if (_Field != null)
            {
                object _FieldValue = _Field.GetValue(structInstance);

                if (_FieldValue != null && _FieldValue is Delegate)
                {
                    Delegate _ObjectDelegate = _FieldValue as Delegate;

                    _ObjectDelegate.DynamicInvoke(new object[] { "Sandy" });
                }
            }
        }
    }
}