using System;

​

public class Program

{

    public static void Main(string[] args)

    {

        //so your LoadFromDll method should return Type. Type doesn't have generic implementation !

        Type type = typeof(SubClass1);

​

        BaseClassUtil.CallFoo<BaseClass>(type);

​

        Type type2 = typeof(SubClass2);

        //you can write BaseClassUtil.CallFoo<SubClass2>(type2); if you want

        BaseClassUtil.CallFoo<BaseClass>(type2);

    }

​

    public class BaseClassUtil

    {

        public static void CallFoo<T>(Type type) where T : BaseClass

        {

            T instance = (T)Activator.CreateInstance(type);

            instance.Foo();

        }

    }

    public class TestClass

    {

        public int ID { get; set; }

​

    }

​

    public abstract class BaseClass

    {

        public abstract void Foo();

    }

​

    public class SubClass1 : BaseClass

    {

        public override void Foo()

        {

            Console.WriteLine("SubClass 1");

        }

    }

​

    public class SubClass2 : BaseClass

    {

        public override void Foo()

        {

            Console.WriteLine("SubClass 2");

        }

​

    }

​

​

}