Command line call help text from inside handler

Hello,

I hope you can help me. I am trying to create a command line application, but I am having trouble with the handling of the commands.

I have a command: Barcode. This command has an option: --list.
When Barcode is called, I want the command to display the help text.
When --list is added, I want it to do something.

However I am running into the issue that I cant call the help from inside the command handler. Is there a way to do this? In my main project I have DI injection set up, but I wouldn't know what I would have to inject to get to the help part of the command.

Here is a simplifyed bit of code showing what I want to do:

```
using Microsoft.Extensions.Hosting;
using System.CommandLine;
using System.CommandLine.Builder;
using System.CommandLine.Hosting;
using System.CommandLine.Parsing;
using UtTools.Controller.Commands.Barcode;

namespace UtToolsCommandLineTest
{
internal class Program
{
static void Main(string[] args)
{
RootCommand root = new RootCommand("Root");
root.AddCommand(new BarcodeCommand());

CommandLineBuilder builder = new CommandLineBuilder(root)
.UseDefaults()
.UseHost(_ => Host.CreateDefaultBuilder(args).ConfigureAppConfiguration((hostContext, config) =>
{

}),
(builder) =>
{
builder.ConfigureServices(services =>
{

});

builder.UseCommandHandler();
});

builder.Build().InvokeAsync(args);
}
}
}
```

```
using System.CommandLine;
using System.CommandLine.Help;
using System.CommandLine.Invocation;

namespace UtTools.Controller.Commands.Barcode
{
internal class BarcodeCommand : Command
{
public BarcodeCommand(string name = "Barcode", string description = "The base command for generating ccsg and q13 barcodes.") : base(name, description)
{
Option listOption = new Option(
aliases: new string[] { "--list", "-l" },
description: "List all available barcodes");

AddOption(listOption);
}

public class BarcodeCommandHandler : ICommandHandler
{
public bool List { get; set; }

public BarcodeCommandHandler()
{
}

public int Invoke(InvocationContext context)
{
return InvokeAsync(context).GetAwaiter().GetResult();
}

public Task InvokeAsync(InvocationContext context)
{
if(!List)
{
/////////////////////////////////
// Should call the help text //
/////////////////////////////////

return Task.FromResult(1);
}

// Do stuff
return Task.FromResult(0);
}
}
}
}
```
```
The end goal is a command like this:
Barcode
├── --List Show all barcodes available
├──Generate
├── --OutputDirectoryPath The output directory
├── --Name
├──All Generate all barcodes
├── --OutputDirectoryPath The output directory
```

Thanks for any help you can give!