File list (Check if you may need any files):
c# language Reference Demo\1.7\1.7\1.7.csproj
..........................\...\...\bin\Debug\1.7.exe
..........................\...\...\...\.....\1.7.pdb
..........................\...\...\...\.....\1.7.vshost.exe
..........................\...\...\obj\x86\Debug\1.7.csproj.FileListAbsolute.txt
..........................\...\...\...\...\.....\1.7.exe
..........................\...\...\...\...\.....\1.7.pdb
..........................\...\...\...\...\.....\DesignTimeResolveAssemblyReferencesInput.cache
..........................\...\...\Program.cs
..........................\...\...\...perties\AssemblyInfo.cs
..........................\...\1.7.sln
..........................\...\1.7.suo
..........................\..8\1.8\1.8.csproj
..........................\...\...\bin\Debug\1.8.exe
..........................\...\...\...\.....\1.8.pdb
..........................\...\...\...\.....\1.8.vshost.exe
..........................\...\...\...\.....\1.8.vshost.exe.manifest
..........................\...\...\obj\x86\Debug\1.8.csproj.FileListAbsolute.txt
..........................\...\...\...\...\.....\1.8.exe
..........................\...\...\...\...\.....\1.8.pdb
..........................\...\...\...\...\.....\DesignTimeResolveAssemblyReferences.cache
..........................\...\...\...\...\.....\DesignTimeResolveAssemblyReferencesInput.cache
..........................\...\...\Program.cs
..........................\...\...\...perties\AssemblyInfo.cs
..........................\...\1.8.sln
..........................\...\1.8.suo
..........................\4.1\4.1\4.1.csproj
..........................\...\...\bin\Debug\4.1.exe
..........................\...\...\...\.....\4.1.pdb
..........................\...\...\...\.....\4.1.vshost.exe
..........................\...\...\...\.....\4.1.vshost.exe.manifest
..........................\...\...\obj\x86\Debug\4.1.csproj.FileListAbsolute.txt
..........................\...\...\...\...\.....\4.1.exe
..........................\...\...\...\...\.....\4.1.pdb
..........................\...\...\...\...\.....\DesignTimeResolveAssemblyReferencesInput.cache
..........................\...\...\...\...\.....\ResolveAssemblyReference.cache
..........................\...\...\Program.cs
..........................\...\...\...perties\AssemblyInfo.cs
..........................\...\4.1.sln
..........................\...\4.1.suo
..........................\..2\4.2\4.2.csproj
..........................\...\...\bin\Debug\4.2.vshost.exe
..........................\...\...\obj\x86\Debug\4.2.csproj.FileListAbsolute.txt
..........................\...\...\...\...\.....\DesignTimeResolveAssemblyReferencesInput.cache
..........................\...\...\Program.cs
..........................\...\...\...perties\AssemblyInfo.cs
..........................\...\4.2.sln
..........................\...\4.2.suo
..........................\..3\4.3\4.3.csproj
..........................\...\...\bin\Debug\4.3.vshost.exe
..........................\...\...\obj\x86\Debug\4.3.csproj.FileListAbsolute.txt
..........................\...\...\...\...\.....\DesignTimeResolveAssemblyReferencesInput.cache
..........................\...\...\Program.cs
..........................\...\...\...perties\AssemblyInfo.cs
..........................\...\4.3.sln
..........................\...\4.3.suo
..........................\5.1\5.1\5.1.csproj
..........................\...\...\5.1.csproj.user
..........................\...\...\bin\Debug\5.1.exe
..........................\...\...\...\.....\5.1.pdb
..........................\...\...\...\.....\5.1.vshost.exe
..........................\...\...\ClassDiagram1.cd
..........................\...\...\obj\x86\Debug\5.1.csproj.FileListAbsolute.txt
..........................\...\...\...\...\.....\5.1.exe
..........................\...\...\...\...\.....\5.1.pdb
..........................\...\...\...\...\.....\DesignTimeResolveAssemblyReferencesInput.cache
..........................\...\...\Program.cs
..........................\...\...\...perties\AssemblyInfo.cs
..........................\...\5.1.sln
..........................\..