项目结构:

ReflectionExample.csproj

-HelloWorld.cs

-Program.cs

源代码:

HelloWorld.cs

using System;
using System.Collections.Generic;
using System.Text;

namespace ReflectionExample
{
    class HelloWorld
    {
        string myName = null;

        public HelloWorld(string name)
        {
            myName = name;
        }

        public HelloWorld()
            : this(null)
        {
        }

        public string Name
        {
            get { return myName; }
        }

        public void SayHello()
        {
            if (myName == null)
                System.Console.WriteLine("Hello World");
            else
                System.Console.WriteLine("Hello," + myName);
        }
    }
}

Program.cs

using System;
using System.Collections.Generic;
using System.Text;
using System.Reflection;

namespace ReflectionExample
{
    class Program
    {
        static void Main(string[] args)
        {
            BindingFlags flags = (BindingFlags.Public | BindingFlags.Static | BindingFlags.Instance | BindingFlags.DeclaredOnly);

            System.Console.WriteLine("列出程序集中的所有类型");
            Assembly a = Assembly.LoadFrom("ReflectionExample.exe");
            Type[] mytypes = a.GetTypes();
            foreach (Type t in mytypes)
            {
                System.Console.WriteLine(t.Name);
            }
            System.Console.ReadLine();

            System.Console.WriteLine("列出HelloWorld类中的所有方法");
            Type ht = typeof(HelloWorld);
            MethodInfo[] mif = ht.GetMethods(flags);
            foreach (MethodInfo mf in mif)
            {
                System.Console.WriteLine(mf.Name);
            }
            System.Console.ReadLine();

            System.Console.WriteLine("实例化HelloWorld,并调用SayHello方法");
            Object obj = Activator.CreateInstance(ht);
            String[] s ={ "ZhenLei" };
            Object objName = Activator.CreateInstance(ht, s);
            MethodInfo msayhello = ht.GetMethod("SayHello",flags);
            msayhello.Invoke(obj, null);
            msayhello.Invoke(objName,null);
            System.Console.ReadLine();

        }
    }
}