using System;

using System.Collections.Generic;

namespace ConsActivator

{

    class ActivatorHelper

    {

        public static void TestMain(string[] args)

        {

            var s1 = CreateListFromType(typeof(Foo));

            var s2 = CreateListFromType(typeof(int));

            var fo = new Foo();

            var s3 = CreateListFromType(fo.GetType());

            Console.WriteLine(s1.ToString());

            Console.WriteLine(s2.ToString());

            Console.WriteLine(s3.ToString());

            Console.WriteLine(fo.GetType().Name);

        }

        static object CreateListFromType(Type t)

        {

            // Create an array of the required type

            Array values = Array.CreateInstance(t, );

            // and fill it with values of the required type

            for (int i = ; i < ; i++)

            {

                values.SetValue(CreateFooFromType(t), i);

            }

            // Create a list of the required type, passing the values to the constructor

            Type genericListType = typeof(List<>);

            Type concreteListType = genericListType.MakeGenericType(t);

            object list = Activator.CreateInstance(concreteListType, new object[] { values });

            // DO something with list which is now an List<t> filled with 50 ts

            return list;

        }

        // Create a value of the required type

        static object CreateFooFromType(Type t)

        {

            return Activator.CreateInstance(t);

        }

    }

    class Foo

    {

        public Foo()

        {

        }

    }

}