Describe: Web crawler written in C#, more suitable for beginner to learn basic, containing the code, run

File list(Click to check if it's the file you need, and recomment it at the bottom):
  c#ÅÀ³æ\App.ico
  ......\AssemblyInfo.cs
  ......\Attribute.cs
  ......\AttributeList.cs
  ......\Backup\App.ico
  ......\......\AssemblyInfo.cs
  ......\......\Attribute.cs
  ......\......\AttributeList.cs
  ......\......\DocumentWorker.cs
  ......\......\Done.cs
  ......\......\Parse.cs
  ......\......\ParseHTML.cs
  ......\......\Spider.cs
  ......\......\Spider.csproj
  ......\......\Spider.csproj.user
  ......\......\Spider.sln
  ......\......\Spider.suo
  ......\......\SpiderForm.cs
  ......\......\SpiderForm.resx
  ......\......\TestSpider.cs
  ......\bin\Debug\Spider.exe
  ......\...\.....\Spider.pdb
  ......\...\.....\Spider.vshost.exe
  ......\...\.....\Spider.vshost.exe.manifest
  ......\DocumentWorker.cs
  ......\Done.cs
  ......\obj\Debug\Spider.csproj.FileListAbsolute.txt
  ......\...\.....\Spider.csproj.GenerateResource.Cache
  ......\...\.....\Spider.exe
  ......\...\.....\Spider.pdb
  ......\...\.....\Spider.projdata
  ......\...\.....\Spider.SpiderForm.resources
  ......\Parse.cs
  ......\ParseHTML.cs
  ......\Spider.cs
  ......\Spider.csproj
  ......\Spider.csproj.user
  ......\Spider.sln
  ......\Spider.suo
  ......\SpiderForm.cs
  ......\SpiderForm.resx
  ......\TestSpider.cs
  ......\UpgradeLog.XML
  ......\_UpgradeReport_Files\UpgradeReport.css
  ......\....................\UpgradeReport.xslt
  ......\....................\UpgradeReport_Minus.gif
  ......\....................\UpgradeReport_Plus.gif
  ......\obj\Debug\temp
  ......\...\.....\TempPE
  ......\bin\Debug
  ......\obj\Debug
  ......\Backup
  ......\bin
  ......\obj
  ......\_UpgradeReport_Files
  c#ÅÀ³æ

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