Program.cs

using Cocona;
using Microsoft.Extensions.Configuration;

namespace CoconaSample.InAction.AppConfiguration;

class Program
{
    private bool _configValue1;
    private string _configValue2;

    // Example (on bash):
    //   dotnet run --
    //   DOTNET_ENVIROMENT=Development dotnet run --
    public Program(IConfiguration configuration)
    {
        // See. https://docs.microsoft.com/en-us/aspnet/core/fundamentals/configuration/?view=aspnetcore-3.1
        _configValue1 = configuration.GetValue<bool>("ConfigValue1");
        _configValue2 = configuration.GetValue<string>("ConfigValue2");
    }

    static void Main(string[] args)
    {
        CoconaApp.Run<Program>(args);
    }

    public void Run()
    {
        Console.WriteLine($"ConfigValue1: {_configValue1}");
        Console.WriteLine($"ConfigValue2: {_configValue2}");
    }
}