c# - is it ok to instantiate lists in my domain object's constructor when using nhibernate? -

i have object have many properties lists. avoid having null checks everywhere before call add, count, clear, etc . . . thought better new lists upfront

so inside resource object in case, have following code:

    public resource()     {         regions = new list<region>();         directs = new list<direct>();     }     public virtual ilist<direct> directs { get; set; }    public virtual ilist<region> region{ get; set; } 

i warning in visual studio saying calling virtual methods in constructor

is there wrong or risk code above when using nhibernate ?? if wrong, there better way of achieving goal?

that's fine. if want cleaner approach, use:

public resource() {     _regions = new list<region>();     _directs = new list<direct>(); }  ilist<direct> _directs; public virtual ilist<direct> directs { { return _directs; } }  ilist<region> _regions; public virtual ilist<region> regions { { return _regions; } } 

and map access="nosetter.pascalcase-underscore" (if use naming convention; check tables @ http://nhibernate.info/doc/nh/en/index.html#mapping-declaration-property other alternatives)