namespace Testassembly

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void Form1_Load(object sender, EventArgs e)

        {

            string ss = AppDomain.CurrentDomain.BaseDirectory + "Debug\\TestDll.dll";

            Assembly assembly = Assembly.LoadFile(ss);

            //获取类型，参数（名称空间+类）

            Type type = assembly.GetType("TestDll.Form1");

            //创建该对象的实例，object类型，参数（名称空间+类）   

           // System.Reflection.MethodInfo method = type.GetMethod("Show");//方法的名称

            object instance = assembly.CreateInstance("TestDll.Form1");

            Form frm = (Form)instance;

            frm.Show();

           // method.Invoke(instance,Object[] parametors = new Object[] { "param" });

        }

    }

}