Entity Framework dbcontext crashing during foreach loop - asp.net-core

Question

I have an asp.net core mvc project. I'm trying to get over 300+ records from a table(s) using entity framework. Here are the models I have:
public partial class Movies
{
public int Id { get; set; }
public string Title { get; set; }
public virtual MovieInfoes MovieInfoes { get; set; }
}
public partial class MovieInfoes
{
public int Id { get; set; }
public string Actors { get; set; }
public string Director { get; set; }
public virtual Movies IdNavigation { get; set; }
}
In the controller section, I have an action that is suppose to list the title, actors, and director data.
public IActionResult ListAllMovies()
{
var movies = context.Movies.Include("MovieInfoes").ToList();
foreach (var movie in movies)
{
string x = movie.MovieInfoes.Actors;
}
return View(movies);
}
For some reason, it is crashing after it iterates 19 records (I'm trying to iterate thru 300+ records). I get an error saying "NullReferenceException: Object reference not set to an instance of an object".
Note: I've tried with lazy loading and eager loading, and both ways result in same error.

Answer 1

You're likely attempting to access movie.MovieInfoes.Actors with an instance of movie that has a null MovieInfoes reference.
Try accessing Actors with a null-conditional operator by changing string x = movie.MovieInfoes.Actors; to string x = movie?.MovieInfoes?.Actors;