Customize the internal of the parser

Some internal parts of the parser can be customized: the converters for the options, the discovery and the activation of the commands, the generation the help, the "console" and the generation of alternate names for the options.

The library uses the dependency injection system provided by Microsoft.Extensions.DependencyInjection.

By default, the library will configure all the services with default implementations when creating the parser by calling BuildParser() on a ParserBuilder instance. In this case, the IServiceProvider that will be used by the parser will have its own scope.

If you want to customize some services, you have to provide your own ServiceProvider when building the parser (by calling the overload BuildParser(IServiceProvider)). Your IServiceProvider have to be configured with the services needed by the parser. This can be done by calling the extension method AddCommandLineParser on the IServiceCollection that will create the IServiceProvider.