............\邮件收发
............\........\EXE
............\........\...\Mail.exe
............\........\...\MailPOP3.exe
............\........\Material

............\........\Setup
............\........\.....\Setup.Exe
............\........\.....\Setup.Ini
............\........\.....\Setup.msi
............\........\Source
............\........\......\Mail

............\........\......\....\AssemblyInfo.cs
............\........\......\....\Form1.cs
............\........\......\....\Form1.resx
............\........\......\....\Mail.csproj
............\........\......\....\Mail.csproj.user
............\........\......\....\Mail.sln
............\........\......\MailPOP3

............\........\......\........\AssemblyInfo.cs
............\........\......\........\Form1.cs
............\........\......\........\Form1.resx
............\........\......\........\MailPOP3.csproj
............\........\......\........\MailPOP3.csproj.user
............\........\......\........\MailPOP3.sln