Is it possible to map collections of primitive types with EF4?

Question

Is there a way to map a collection/dictionary of primitive types in Entity Framework. I would like to have:

public class Abc  
{  
    public virtual long Id {get;set;}  
    public virtual ... some properties  
    public virtual IList<float> Numbers;  
    // or even:  
    public virtual IDictionary<DateTime,decimal> MoreNumbers;  
}  

The list could be mapped to a table with three columns: AbcId, index, float. The dictionary can be mapped to a table with AbcId, datetime, numeric(10,3).

Thanks
Val