This source is the C# Entry classic book, Chapter 9 of the source code

Code
....\Ch09ClassLib
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....\............\............\Ch09ClassLib.csproj
....\............\............\Ch09ClassLib.csproj.user
....\............\............\MyExternalClass.cs
....\............\............\MyInternalClass.cs
....\............\............\obj
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....\............\............\...\.....\Ch09ClassLib.dll
....\............\............\...\.....\Ch09ClassLib.pdb
....\............\............\...\.....\Ch09ClassLib.Properties.Resources.resources
....\............\............\...\.....\ResGen.cache
....\............\............\...\.....\TempPE
....\............\............\Properties
....\............\............\..........\AssemblyInfo.cs
....\............\............\..........\Resources.cs
....\............\............\..........\Resources.resx
....\............\............\..........\Settings.cs
....\............\............\..........\Settings.settings
....\............\Ch09ClassLib.sln
....\Ch09Ex01
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....\........\........\...\.....\Ch09Ex01.exe
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....\........\........\...\.....\Ch09Ex01.vshost.exe
....\........\........\Ch09Ex01.csproj
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....\........\........\ClassDiagram1.cd
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....\........\........\...\.....\Ch09Ex01.Properties.Resources.resources
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....\........\........\...\.....\TempPE
....\........\........\...\Release
....\........\........\Program.cs
....\........\........\Properties
....\........\........\..........\AssemblyInfo.cs
....\........\........\..........\Resources.cs
....\........\........\..........\Resources.resx
....\........\........\..........\Settings.cs
....\........\........\..........\Settings.settings
....\........\Ch09Ex01.sln
....\Ch09Ex02
....\........\Ch09Ex02
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....\........\........\...\Debug
....\........\........\...\.....\Ch09ClassLib.dll
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....\........\........\...\.....\Ch09Ex02.exe
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....\........\........\Ch09Ex02.csproj
....\........\........\Ch09Ex02.csproj.user
....\........\........\obj
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....\........\........\...\.....\Ch09Ex02.exe
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....\........\........\...\.....\Ch09Ex02.Properties.Resources.resources
....\........\........\...\.....\ResGen.cache
....\........\........\...\.....\ResolveAssemblyReference.cache
....\........\........\...\.....\TempPE
....\........\........\...\Release
....\........\........\Program.cs
....\........\........\Properties
....\........\........\..........\AssemblyInfo.cs
....\........\........\..........\Resources.cs
....\........\........\..........\Resources.resx
....\........\........\..........\Settings.cs
....\........\........\..........\Settings.settings
....\........\Ch09Ex02.sln
....\Ch09Ex03
....\........\Ch09Ex03
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....\........\........\...\.....\Ch09Ex03.exe
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....\........\........\Ch09Ex03.csproj
....\........\........\Ch09Ex03.csproj.user
....\........\........\obj
....\........\........\...\Debug
....\........\........\...\.....\Ch09Ex03.exe
....\........\........\...\.....\Ch09Ex03.pdb
....\........\........\...\.....\Ch09Ex03.Properties.Resources.resources
....\........\........\...\.....\ResGen.cache
....\........\........\...\.....\TempPE
....\........\........\...\Release
....\...

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