cli-ninject-hosting/CustomHostingDemo/HelloCommand.cs

using Ninject.Syntax;
using System;
using System.Collections.Generic;
using System.CommandLine;
using System.CommandLine.Invocation;
using System.CommandLine.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CustomHostingDemo
{
    public class HelloCommand : Command
    {
        public HelloCommand()
            : base("hello", "says hello")
        {
            Handler = CommandHandler.Create(typeof(DefaultHandler).GetMethod(nameof(ICommandHandler.InvokeAsync)));
            AddOption(new Option<bool>("--verbose"));
        }

        public class DefaultHandler : ICommandHandler
        {
            private readonly IResolutionRoot _resolutionRoot;

            public bool Verbose { get; set; }

            public DefaultHandler(IResolutionRoot resolutionRoot)
            {
                _resolutionRoot = resolutionRoot;
            }

            public Task<int> InvokeAsync(InvocationContext context)
            {
                context.Console.Out.WriteLine("Hello YOU!");
                context.Console.Out.WriteLine($"C: --verbose {Verbose}");

                return Task.FromResult(0);
            }
        }
    }
}