How do I pass a custom class and a seperate array to a view in ASP.NET MVC?

Question

Hi,
I want to pass a custom class to a View, along with an array derived from some of that class's values. I can pass the array without problems, but I've got no idea on how to pass the class as a whole - I'm new to OO programming, never mind MVC.

I've created a ViewModel which looks like this: (put together after reading the Nerddinner & Msuic Store tutorials)

namespace CourseViewMaps.ViewModels
{
    public class CourseViewMapViewModel
    {
        public List<CourseStreamUnitDetail> CourseStreamUnitDetails { get; set; }

        public CourseViewMapViewModel() { }

        public CourseViewMapViewModel(List<CourseStreamUnitDetail> unitdetails
                    )
        {
            this.CourseStreamUnitDetails = unitdetails;

        }

        public Array CategoryNames { get; set; }
    }
}

And am currently passing the array to the view as such:

var ViewData = new CourseViewMapViewModel()
            {
                CategoryNames = arrayOut.ToArray() 
                //arrayOut is derived from a CourseStreamUnitDetail property
            };

            return View(ViewData);

I know I'm missing something in the ViewData declaration, but can't figure out what. If it is simply to add a var for CourseViewMapViewmodel(), how do I do that??

Any help would be much appreciated!