using System;

namespace ConsoleApplication
{
    class Program
    {
        static void Main( string[] args )
        {
            var assembly = System.Reflection.Assembly.GetAssembly( typeof( System.Collections.IEnumerable ) );

            foreach ( Type type in assembly.GetExportedTypes() )
            {
                if ( type.IsClass && type.GetInterface( "IEnumerable" ) != null )
                {
                    Console.WriteLine( type.Name );
                }
            }

            Console.ReadKey();
        }
    }
}