含浏览历史菜单问题

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;namespace 最近项目
{
    public partial class Form1 : Form
    {
        string address;
        public Form1()
        {
            InitializeComponent();
            address = System.Environment.CurrentDirectory;
        }
        private void ShowWindows(string fileName)
        {
            Image p = Image.FromFile(fileName);
            Form f = new Form();
            f.MdiParent = this;
            f.BackgroundImage = p;
            f.Show();
        
        }        private void 打开ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            openFileDialog1.FileName = "";
            this.openFileDialog1.ShowDialog();
            StreamWriter sw = new StreamWriter(address + "\\Menu.ini", true);
            sw.WriteLine(openFileDialog1.FileName);//写入INI文件
            sw.Flush();
            sw.Close();
            ShowWindows(openFileDialog1.FileName);
            
        }        private void Form1_Load(object sender, EventArgs e)
        {
            StreamReader sr = new  StreamReader (address + "\\Menu.ini");
            int i = this.文件ToolStripMenuItem.DropDownItems.Count - 2;
            while (sr.Peek() >= 0)
            {
                ToolStripMenuItem menuItem = new ToolStripMenuItem(sr.ReadLine());
                this.文件ToolStripMenuItem.DropDownItems.Insert(i, menuItem);
                i++;
                menuItem.Click += new EventHandler(menuItem_Click);
 
            }
            sr.Close();
        }        void menuItem_Click(object sender, EventArgs e)
        {
            throw new NotImplementedException();
        }
    }
}
错误提示：找不到指定路径的Menu.ini文件。
请高手指点啊！！！！！