File list (Check if you may need any files):
C#xiazai
........\Backup
........\......\DownloadThread.cs
........\......\Tester.csproj
........\......\Tester.csproj.user
........\......\WebDownload.cs
........\......\WebDownload.csproj
........\......\WebDownload.csproj.user
........\......\WebDownload.sln
........\......\WebDownload.suo
........\......\WebDownloadForm.cs
........\......\WebDownloadForm.resx
........\bin
........\...\Debug
........\...\Tester.exe
........\...\Tester.pdb
........\...\Tester.vshost.exe
........\...\WebDownload.dll
........\...\WebDownload.pdb
........\Class1.cs
........\DownloadThread.cs
........\obj
........\...\Debug
........\...\Tester.csproj.FileList.txt
........\...\WebDownload.csproj.FileList.txt
........\Tester.csproj
........\Tester.csproj.user
........\UpgradeLog.XML
........\WebDownload.cs
........\WebDownload.csproj
........\WebDownload.csproj.user
........\WebDownload.sln
........\WebDownload.suo
........\WebDownloadForm.cs
........\WebDownloadForm.resx
........\_UpgradeReport_Files
........\....................\UpgradeReport.css
........\....................\UpgradeReport.xslt
........\....................\UpgradeReport_Minus.gif
........\....................\UpgradeReport_Plus.gif