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;
using?System.Security.Cryptography;

namespace?Cprogram
{
????public?partial?class?Form1:?Form
????{
????????private?DESCryptoServiceProvider?des;
????????private?string?key2;
????????public?Form1（）
????????{
????????????InitializeComponent（）;
????????????des?=?new?DESCryptoServiceProvider（）;
????????????key2?=?“liuyongming“;
????????}

????????private?void?btnEncrypt_Click（object?sender?EventArgs?e）
????????{

????????????//dess?=?new?DESCryptoServiceProvider（）;
????????????byte[]?key?=?Encoding.UTF8.GetBytes（key2.Substring（08））;
????????????byte[]?key1=key;
????????????byte[]?Data?=?Encoding.UTF8.GetBytes（txtdata.Text）;
????????????MemoryStream?ms?=?new?MemoryStream（）;
????????????CryptoStream?cs?=?new?CryptoStream（msdes.CreateEncryptor（keykey1）?CryptoStreamMode.Write）;
????????????cs.Write（Data?0?Data.Length）;
????????????cs.FlushFinalBlock（）;
????????????StreamWriter?sw?=?new?StreamWriter（“Encrypt.txt“）;
????????????sw.WriteLine（Convert.Tobase64String（ms.ToArray（））?+?‘\n‘）;?
????????????sw.Close（）;
????????}

????????private?void?btnexit_Click（object?sender?EventArgs?e）
????????{
????????????this.Close（）;
????????}

????????private?void?btndecrypt_Click（object?sender?EventArgs?e）
????????{
????????????byte[]?key?=?Encoding.UTF8.GetBytes（key2.Substring（0?8））;
????????????byte[]?key1?=?key;
????????????StreamReader?sr=new?StreamReader（“Encrypt.txt“）;
????????????byte[]?data?=?Convert.Frombase64String（sr.ReadToEnd（））;
????????????MemoryStream?ms?=?new?MemoryStream（）;
????????????CryptoStream?cs?=?new?CryptoStream（ms?des.CreateDecryptor（key?key1）?CryptoStreamMode.Write）;
????????????cs.Write（data?0?data.Length）;
????????????cs.FlushFinalBlock（）;
????????????StreamWriter?sw?=?new?StreamWriter（“Decrypt.txt“）;
????????????sw.WriteLine（Convert.Tobase64String（ms.ToArray（）））;
????????????sw.Close（）;
????????}
????}
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件??????10240??2009-05-12?10:15??Cprogram\Cprogram\bin\Debug\Cprogram.exe

?????文件??????26112??2009-05-12?10:15??Cprogram\Cprogram\bin\Debug\Cprogram.pdb

?????文件??????14328??2009-05-12?10:15??Cprogram\Cprogram\bin\Debug\Cprogram.vshost.exe

?????文件????????490??2007-07-21?01:33??Cprogram\Cprogram\bin\Debug\Cprogram.vshost.exe.manifest

?????文件?????????30??2009-05-12?10:18??Cprogram\Cprogram\bin\Debug\Decrypt.txt

?????文件?????????35??2009-05-12?10:18??Cprogram\Cprogram\bin\Debug\Encrypt.txt

?????文件???????3762??2009-05-12?09:28??Cprogram\Cprogram\Cprogram.csproj

?????文件???????2123??2009-05-12?10:15??Cprogram\Cprogram\Form1.cs

?????文件???????5532??2009-05-12?09:53??Cprogram\Cprogram\Form1.Designer.cs

?????文件???????5814??2009-05-12?09:53??Cprogram\Cprogram\Form1.resx

?????文件????????795??2009-05-12?10:15??Cprogram\Cprogram\obj\Debug\Cprogram.csproj.FileListAbsolute.txt

?????文件????????847??2009-05-12?09:53??Cprogram\Cprogram\obj\Debug\Cprogram.csproj.GenerateResource.Cache

?????文件??????10240??2009-05-12?10:15??Cprogram\Cprogram\obj\Debug\Cprogram.exe

?????文件????????180??2009-05-12?09:53??Cprogram\Cprogram\obj\Debug\Cprogram.Form1.resources

?????文件??????26112??2009-05-12?10:15??Cprogram\Cprogram\obj\Debug\Cprogram.pdb

?????文件????????180??2009-05-12?09:28??Cprogram\Cprogram\obj\Debug\Cprogram.Properties.Resources.resources

?????文件????????489??2009-05-12?08:30??Cprogram\Cprogram\Program.cs

?????文件???????1372??2009-05-12?08:30??Cprogram\Cprogram\Properties\AssemblyInfo.cs

?????文件???????2866??2009-05-12?08:30??Cprogram\Cprogram\Properties\Resources.Designer.cs

?????文件???????5612??2009-05-12?08:30??Cprogram\Cprogram\Properties\Resources.resx

?????文件???????1092??2009-05-12?08:30??Cprogram\Cprogram\Properties\Settings.Designer.cs

?????文件????????249??2009-05-12?08:30??Cprogram\Cprogram\Properties\Settings.settings

?????文件????????914??2009-05-12?08:31??Cprogram\Cprogram.sln

????..A..H.?????14336??2009-05-12?10:19??Cprogram\Cprogram.suo

?????目錄??????????0??2009-05-12?11:11??Cprogram\Cprogram\obj\Debug\Refactor

?????目錄??????????0??2009-05-12?11:11??Cprogram\Cprogram\obj\Debug\TempPE

?????目錄??????????0??2009-05-12?11:11??Cprogram\Cprogram\bin\Debug

?????目錄??????????0??2009-05-12?11:11??Cprogram\Cprogram\obj\Debug

?????目錄??????????0??2009-05-12?11:11??Cprogram\Cprogram\bin

?????目錄??????????0??2009-05-12?11:11??Cprogram\Cprogram\obj

............此處省略6個文件信息