DES数据加密解密（已测试）

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Security.Cryptography;
using System.IO;
using System.Text;
using System.Data.SqlClient;
using System.Net;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    /// <summary>
    /// DES密钥加密解密方法
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    //加密调用
    protected void Button1_Click(object sender, EventArgs e)
    {
        string newpass;