With the book code

Visual CSharp Step By Step\Appendix\CustomerDB.py
..........................\........\CustomerDB.rb
..........................\........\PythonInteroperability\PythonInteroperability\bin\Debug\PythonInteroperability.vshost.exe
..........................\........\......................\......................\...\.....\PythonInteroperability.vshost.exe.manifest
..........................\........\......................\......................\obj\x86\Debug\DesignTimeResolveAssemblyReferencesInput.cache
..........................\........\......................\......................\...\...\.....\PythonInteroperability.csproj.FileListAbsolute.txt
..........................\........\......................\......................\Program.cs
..........................\........\......................\......................\...perties\AssemblyInfo.cs
..........................\........\......................\......................\PythonInteroperability.csproj
..........................\........\......................\......................\PythonInteroperability.csproj.user
..........................\........\......................\PythonInteroperability.sln
..........................\........\......................\PythonInteroperability.suo
..........................\........\README.txt
..........................\........\.ubyInteroperability\RubyInteroperability\Program.cs
..........................\........\....................\....................\...perties\AssemblyInfo.cs
..........................\........\....................\....................\RubyInteroperability.csproj
..........................\........\....................\RubyInteroperability.sln
..........................\Chapter 1\TextHello - Complete\TextHello\bin\Debug\TextHello.exe
..........................\.........\....................\.........\...\.....\TextHello.pdb
..........................\.........\....................\.........\...\.....\TextHello.vshost.exe
..........................\.........\....................\.........\...\.....\TextHello.vshost.exe.manifest
..........................\.........\....................\.........\obj\x86\Debug\DesignTimeResolveAssemblyReferencesInput.cache
..........................\.........\....................\.........\...\...\.....\TextHello.csproj.FileListAbsolute.txt
..........................\.........\....................\.........\...\...\.....\TextHello.exe
..........................\.........\....................\.........\...\...\.....\TextHello.pdb
..........................\.........\....................\.........\Program.cs
..........................\.........\....................\.........\...perties\AssemblyInfo.cs
..........................\.........\....................\.........\TextHello.csproj
..........................\.........\....................\TextHello.sln
..........................\.........\....................\TextHello.suo
..........................\.........\WPFHello - Complete\WPFHello\App.xaml
..........................\.........\...................\........\App.xaml.cs
..........................\.........\...................\........\MainWindow.xaml
..........................\.........\...................\........\MainWindow.xaml.cs
..........................\.........\...................\........\Properties\AssemblyInfo.cs
..........................\.........\...................\........\..........\Resources.Designer.cs
..........................\.........\...................\........\..........\Resources.resx
..........................\.........\...................\........\..........\Settings.Designer.cs
..........................\.........\...................\........\..........\Settings.settings
..........................\.........\...................\........\WPFHello.csproj
..........................\.........\...................\WPFHello.sln
..........................\.........0\Cards Using Arrays\Cards\App.xaml
..........................\..........\..................\.....\App.xaml.cs
..........................\..........\..................\.....\bin\Debug\Cards.exe

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