动态创建菜单项

如何从简单到复杂一步步创建menustrip,
一步步提升程序的抽象程序,努力做到相同的代码从来不写两次
相同功能的代码不写两次

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

namespace CSLearn
{
   public class CreateMenu
    {
        public MenuStrip GetMenu()
        {
            MenuStrip ms = new MenuStrip();
            ToolStripMenuItem tsmi = new ToolStripMenuItem("file");

            //------------------------------------------
            //ver1
            //  tsmi.Click += new EventHandler(tsmi_Click);

            //------------------------------------------
            //ver2
            //MyCommandDeal test = new MyCommandDeal();
            //tsmi.Click += test.DealFileCommadn;


            //------------------------------------------
            //ver3
            string dealclassname = "CSLearn.MyCommandDeal2";
            object obj = Assembly.GetExecutingAssembly().CreateInstance(dealclassname);
            ICommandDeal test = obj as ICommandDeal;
            if (test == null)
            {
                MessageBox.Show("动态创建类型失败");
                throw new Exception("传入的类型参数不对,创建类型失败");
            }
            tsmi.Click += test.DealFileCommand;

            ToolStripMenuItem tsmiedit = new ToolStripMenuItem("edit");
            tsmiedit.Click += new EventHandler(tsmiedit_Click);
          
            
            
            ms.Items.AddRange(new ToolStripItem[] { tsmi,tsmiedit});
            return ms;             
        }
        //------------------------------------------
        //ver1
        void tsmiedit_Click(object sender, EventArgs e)
        {
            MessageBox.Show("use this command to edit a file");
        }

        void tsmi_Click(object sender, EventArgs e)
        {
            MessageBox.Show("Use this command to crate a menu");
        }
    }

    //------------------------------------------
    //ver2
    public class MyCommandDeal
    {
        public void DealFileCommadn(object sender, EventArgs e)
        {
            MessageBox.Show("mycommand deal deal with the file command");
        }
    }

    //------------------------------------------
    //ver3
    public interface ICommandDeal
    {
        void DealFileCommand(object sender, EventArgs e);
    }

    public class MyCommandDeal2:ICommandDeal
    {
        ICommandDeal 成员#region ICommandDeal 成员

        public void DealFileCommand(object sender, EventArgs e)
        {
            MessageBox.Show("this is the second version of cxy command deal ,use this command to crate a file");
        }

        #endregion
    } 
}