The sample program in C# Step By Step. For newcomers to learn to use.

Visual CSharp Step By Step\Appendix\CustomerDB.py
..........................\........\CustomerDB.rb
..........................\........\PythonInteroperability\PythonInteroperability\Program.cs
..........................\........\......................\......................\...perties\AssemblyInfo.cs
..........................\........\......................\......................\PythonInteroperability.csproj
..........................\........\......................\PythonInteroperability.sln
..........................\........\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
..........................\.........\...................\........\bin\Debug\WPFHello.exe
..........................\.........\...................\........\...\.....\WPFHello.pdb
..........................\.........\...................\........\...\.....\WPFHello.vshost.exe
..........................\.........\...................\........\...\.....\WPFHello.vshost.exe.manifest
..........................\.........\...................\........\MainWindow.xaml
..........................\.........\...................\........\MainWindow.xaml.cs
..........................\.........\...................\........\obj\x86\Debug\App.g.cs
..........................\.........\...................\........\...\...\.....\App.g.i.cs
..........................\.........\...................\........\...\...\.....\DesignTimeResolveAssemblyReferences.cache
..........................\.........\...................\........\...\...\.....\DesignTimeResolveAssemblyReferencesInput.cache
..........................\.........\...................\........\...\...\.....\GenerateResource.read.1.tlog
..........................\.........\...................\........\...\...\.....\GenerateResource.write.1.tlog
..........................\.........\...................\........\...\...\.....\MainWindow.baml
..........................\.........\...................\........\...\...\.....\MainWindow.g.cs
..........................\.........\...................\........\...\...\.....\MainWindow.g.i.cs
..........................\.........\...................\........\...\...\.....\TempPE\Properties.Resources.Designer.cs.dll
..........................\.........\...................\........\...\...\.....\WPFHello.csproj.FileListAbsolute.txt
..........................\.........\.............

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