laatzen/Common/CommonConsole/Program.cs

using System;
using System.Collections.Concurrent;
using System.Linq;

namespace CommonConsole
{
    public class Program
    {

        public class ServiceProvider : IServiceProvider
        {
            private static readonly ServiceProvider serviceProvider
                = new ServiceProvider();
            private static readonly ConcurrentDictionary<Type, object> services
                = new ConcurrentDictionary<Type, object>();

            private ServiceProvider()
            {

            }

            public object GetService(Type serviceType)
            {
                return services.GetOrAdd(serviceType, default(object));
            }

            public static T GetService<T>()
            {
                var serviceType = typeof(T);
                var serviceInstance = default(T);

                if (serviceProvider.GetService(serviceType) is T existingInstance)
                {
                    serviceInstance = existingInstance;
                }
                else if (CreateInstance(serviceType) is T newInstance)
                {
                    serviceInstance = newInstance;
                }

                return serviceInstance;
            }

            private static object CreateInstance(Type instanceType)
            {
                var instance = default(object);
                var constructor = instanceType
                    .GetConstructors()
                    .OrderBy(x => x.GetParameters().Length)
                    .FirstOrDefault();

                if (constructor != null)
                {
                    var parameters = constructor.GetParameters();
                    var parametersLength = parameters.Length;
                    var createParameters = new object[parametersLength];

                    for (int i = 0; i < parametersLength; i++)
                    {
                        var parameterType = parameters[i].ParameterType;
                        var parameter = serviceProvider.GetService(parameterType);

                        if (parameter is null)
                        {
                            parameter = CreateInstance(parameterType);
                        }
                    }

                    try
                    {
                        instance = constructor.Invoke(createParameters);
                    }
                    catch (Exception e)
                    {
                        Console.WriteLine(e);
                    }
                }

                return instance;
            }
        }

        public class TestInstance
        {
            public TestInstance(TestValue value)
            {
                Console.WriteLine("Created");
            }
        }

        public class TestValue
        {

        }

        public static void Main()
        {
            var service = ServiceProvider.GetService<TestInstance>();
        }
    }
}