c# - Accessing an Eager loaded navigation property causes lazy load -

i have navigation property eager loaded inside using statement. now, in view when try access property non-existent fk(f.e. -1 or deleted row in master table), ef tries lazy load , fails, since context disposed. there can prevent exception? first option catching it, other turn off lazy loading , maybe proxy creation in same occasion...but there other options or checks preformed?

public actionresult details(int id) {     post post;     using (var db = new blogdbcontext())     {         post = db.posts.where(p => p.id == id)             .include(p => p.comments.select(c => c.author))             .singleordefault();     }     if (post == null)     {         return httpnotfound();     }      return partialview(post); }