使用版本重定向解决以COM方式调用Excel程序集版本不一致问题

using System;
using System.ComponentModel;
using System.Windows.Forms;

namespace WindowsFormsApplication4
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            OpenFileDialog dialog = new OpenFileDialog();
            dialog.Filter = "*.xls|*.xls|*.xlsx|*.xlsx";
            dialog.Multiselect = false;
            dialog.FileOk += Dialog_FileOk;
            dialog.ShowDialog();
        }

        private void Dialog_FileOk(object sender, CancelEventArgs e)
        {
            OpenFileDialog dialog = sender as OpenFileDialog;
            if (dialog != null)
            {
                String FileName = dialog.FileName;

                Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application();
                excel.Visible = true;
                Microsoft.Office.Interop.Excel.Workbooks books = excel.Workbooks;
                books.Open(FileName);
                
                //excel.Quit();
            }
        }       
    }
}

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.Office.Interop.Excel"
        publicKeyToken="71e9bce111e9429c"
        culture="neutral" />
        <bindingRedirect
          oldVersion="15.0.0.0"
          newVersion="12.0.0.0"/>
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
</configuration>