Switched from CommandUtils sample to Logging sample.
MODIFY
src/Chapter10/Chapter10.csproj
src/Chapter10/Chapter10.csproj
</Compile>
</ItemGroup>
<ItemGroup>
- <PackageReference Include="Microsoft.Extensions.CommandLineUtils" Version="1.1.1" />
+ <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="3.1.2" />
+ <PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="3.1.2" />
</ItemGroup>
</Project>

Switched from CommandUtils sample to Logging sample.