asp.net mvc strongly typed view model with multiselect

Question

Hi,

I would like to know how i can bind my form values to my strongly typed view from a MultiSelect box.

Obviously when the form submits the multi-select box will submit a delittemered string of my values selected...what is the best way to convert this string of values back into a list of objects to attach to my model to be updated?

public class MyViewModel {
    public List<Genre> GenreList {get; set;}
    public List<string> Genres { get; set; }
}

When updating my model inside the controller i am using UpdateModel like below:

Account accountToUpdate = userSession.GetCurrentUser();
UpdateModel(accountToUpdate);

However i need to somehow get the values from the string back into objects.

I beleive it may have something to do with model-binders but i can't find any good clear examples of how to do this.

Thanks!! Paul