Linq - check condition in where clause if field can be null

Question

I have question - how to check condition in where clause even when item has no reference?

Most basic way - I am checking field from my Class, which can be null. When I j

Answer 1

 var soldOutProducts = from p in list 
            where p.destinataire != null && p.destinataire.StartsWith("D") 
            select p;