namespace export_test
{
    [Register("export_test.ClassToExport")]
    public class ClassToExport
    {
        [Export("ClassToExport")]
        public ClassToExport()
        {
            // ...
        }

        [Export("DoSomething")]
        public void DoSomething()
        {
            // ...
        }

        public Action<string> ReturnAnyText { get; set;}
    }
}