Excluded "HelloWorld" files
Also removed top level statement (which wasn't needed in this branch)
MODIFY
src/Chapter01/Chapter01.csproj
src/Chapter01/Chapter01.csproj
</PropertyGroup>
<Import Project="..\Chapter.props" />
<ItemGroup>
+ <Compile Remove="HelloWorld\**" />
+ <Compile Remove="Listing01.01A.HelloWorldInC#.cs" />
<Compile Remove="Listing01.02.SampleNETCoreConsoleProjectFile.cs" />
<Compile Remove="Listing01.20.SampleCILOutput.cs" />
</ItemGroup>
</Compile>
</ItemGroup>
<ItemGroup>
+ <None Include="Listing01.01A.HelloWorldInC#.cs" />
<None Include="Listing01.02.SampleNETCoreConsoleProjectFile.cs" />
<None Include="Listing01.20.SampleCILOutput.cs" />
</ItemGroup>

DELETE
src/Chapter01/Listing01.01A.HelloWorldInC#.cs
-
-#region INCLUDE
-System.Console.WriteLine("Hello. My name is Inigo Montoya.");
-#endregion INCLUDE
-

Excluded "HelloWorld" files 

Also removed top level statement (which wasn't needed in this branch)