using System;

using System.Linq;

using DryIoc;

​

namespace DryIoc_example

{

    public interface IService {}

    class ServiceImpl_1 : IService {}

    class ServiceImpl_2 : IService {}

​

    public class Program

    {

        public static void Main()

        {

                var container = new Container();

​

                container.Register<IService, ServiceImpl_1>();

                container.Register<IService, ServiceImpl_2>();

                var myService = container.TryResolveByImplementation<IService>(typeof(ServiceImpl_1));

​

                // this line is expected to print the type of ServiceImpl_2

                Console.WriteLine(myService.GetType());

        }

​

    }

    public static class ContainerExtensions

    {

        public static TService TryResolveByImplementation<TService>(this IContainer container, Type implementationType)

        {

            var factory = container.GetAllServiceFactories(typeof(TService))

                .FirstOrDefault(f => f.Value.ImplementationType == implementationType);

            return factory != null 

                ? container.Resolve<TService>(serviceKey: factory.Key) 

                : default(TService);

        }

    }

}