using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;

namespace com.example.di
{
    class Program
    {
        static void Main(string[] args)
        {
            // Set up configuration sources.
            var builder = new ConfigurationBuilder()
                .SetBasePath(Path.Combine(Directory.GetCurrentDirectory()))
                .AddJsonFile("appsettings.json", optional: true);
            IConfiguration config = builder.Build();

            // Build service collection
            var serviceCollection = new ServiceCollection();

            // Add service to collection
            serviceCollection.AddScoped((sp) => config);

            // Build service provider
            var serviceProvider = serviceCollection.BuildServiceProvider();

            // Get service from provider
            serviceProvider.GetService<IConfiguration>()
            ;
        }
    }
}