EntitySQL -- Object reference not set to an instance of an object

Question

I am getting this error when I try to do an insert on a column that is a foreign key. Here is how I am assigning the value

var at = MvcApplication1.Entity.alttitles.Createalttitles(0, altTitleText);
        at.question.question_id = questionid;   //Error here
        at.userinfo.user_userid = _AuthorID;    //Error here
        context.AddToalttitles(at);
        res = context.SaveChanges();

When I made the question_id and the userid a foreign key I started getting this error. Is there a way to fix this?

Answer 1

Check if at is not null before assigning its properties?