c# read after programming know, chapter exercises, and I do not know where to Message

01
..\A
..\.\A_1_1

..\.\.....\AssemblyInfo.cs
..\.\.....\A_1_1.csproj
..\.\.....\A_1_1.csproj.user
..\.\.....\A_1_1.sln
..\.\.....\bin
..\.\.....\...\Debug
..\.\.....\Form1.cs
..\.\.....\Form1.resx
..\.\.....\obj
..\.\.....\...\Debug
..\.\A_1_2
..\.\.....\A_1_2.CS
..\B
..\.\B_1_1

..\.\.....\AssemblyInfo.cs
..\.\.....\bin
..\.\.....\...\Debug
..\.\.....\B_1_1.csproj
..\.\.....\B_1_1.csproj.user
..\.\.....\B_1_1.sln
..\.\.....\Form1.cs
..\.\.....\Form1.resx
..\.\.....\obj
..\.\.....\...\Debug
..\C
..\.\C_1_1
..\.\.....\C_1_1.CS
..\.\.....\C_1_1.exe
..\D
..\.\D_1_1

..\.\.....\AssemblyInfo.cs
..\.\.....\bin
..\.\.....\...\Debug
..\.\.....\D_1_1.csproj
..\.\.....\D_1_1.csproj.user
..\.\.....\D_1_1.sln
..\.\.....\Form1.cs
..\.\.....\Form1.resx
..\.\.....\obj
..\.\.....\...\Debug
..\.\D_1_2
..\.\.....\D_1_2(A).CS
..\.\.....\D_1_2(B).CS
..\.\选择题填空题.doc

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