File list (Check if you may need any files):
ch02
....\EX2-1
....\.....\AssemblyInfo.cs
....\.....\bin
....\.....\...\Debug
....\.....\Class1.cs
....\.....\EX2-1.csproj
....\.....\EX2-1.csproj.user
....\.....\EX2-1.sln
....\.....\obj
....\.....\...\Debug
....\EX2-2
....\.....\AssemblyInfo.cs
....\.....\bin
....\.....\...\Debug
....\.....\Class1.cs
....\.....\EX2-2.csproj
....\.....\EX2-2.csproj.user
....\.....\EX2-2.sln
....\.....\obj
....\.....\...\Debug
....\EX2-3
....\.....\AssemblyInfo.cs
....\.....\bin
....\.....\...\Debug
....\.....\Class1.cs
....\.....\EX2-3.csproj
....\.....\EX2-3.csproj.user
....\.....\EX2-3.sln
....\.....\obj
....\.....\...\Debug
....\EX2-4
....\.....\AssemblyInfo.cs
....\.....\bin
....\.....\...\Debug
....\.....\Class1.cs
....\.....\EX2-4.csproj
....\.....\EX2-4.csproj.user
....\.....\EX2-4.sln
....\.....\obj
....\.....\...\Debug