How to set null to a GUID property

Question

I have an object of type Employee which has a Guid property. I know if I want to set to null I must to define my type property as nullable Nullable

Answer 1

Choose your poison - if you can't change the type of the property to be nullable then you're going to have to use a "magic" value to represent NULL. Guid.Empty seems as good as any unless you have some specific reason for not wanting to use it. A second choice would be Guid.Parse("ffffffff-ffff-ffff-ffff-ffffffffffff") but that's a lot uglier IMHO.