CliFx/CliFx.Tests.Dummy/Commands/AddCommand.cs

using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using CliFx.Attributes;
using CliFx.Models;
using CliFx.Services;

namespace CliFx.Tests.Dummy.Commands
{
    [Command("add", Description = "Calculate the sum of all input values.")]
    public class AddCommand : Command
    {
        [CommandOption("values", 'v', IsRequired = true, Description = "Input values.")]
        public IReadOnlyList<double> Values { get; set; }

        protected override ExitCode Process()
        {
            var result = Values.Sum();
            Output.WriteLine(result.ToString(CultureInfo.InvariantCulture));

            return ExitCode.Success;
        }
    }
}