File list (Check if you may need any files):
ch13
....\EX13-1
....\......\App.ico
....\......\AssemblyInfo.cs
....\......\EX13-1.csproj
....\......\EX13-1.csproj.user
....\......\EX13-1.sln
....\......\EX13-1.suo
....\......\Form1.cs
....\......\Form1.resx
....\......\bin
....\......\...\Debug
....\......\...\.....\EX13-1.exe
....\......\...\.....\EX13-1.pdb
....\EX13-2
....\......\App.ico
....\......\AssemblyInfo.cs
....\......\EX13-2.csproj
....\......\EX13-2.csproj.user
....\......\EX13-2.sln
....\......\EX13-2.suo
....\......\Form1.cs
....\......\Form1.resx
....\......\bin
....\......\...\Debug
....\......\...\.....\EX13-2.exe
....\......\...\.....\EX13-2.pdb