Entity framework code-first null foreign key

Question

I have a User < Country model. A user belongs to a country, but may not belong to any (null foreign key).

How do I set this up? When I t

Answer 1

I recommend to read Microsoft guide for use Relationships, Navigation Properties and Foreign Keys in EF Code First, like this picture.

Guide link below:

https://docs.microsoft.com/en-gb/ef/ef6/fundamentals/relationships?redirectedfrom=MSDN