Entity Framework Code First NullReferenceException

Question

I'm using Entity Framework Code First, I've an entity Articolo and ZefiroContext : DbContext which contains the following declaration:

public DbSet<Articolo> Articoli { get; set; }

When I run the following code:

var a = new ZefiroContext().Articoli;
List<Articolo> r;
if (a != null) 
    r = a.ToList();
else
    r = new List<Articolo>();

I get a NullReferenceException at line r = a.ToList(); . I have no Articolo entites in my database so I expect my variable r to point to an empty List<Articolo> .

Answer 1

您只需要。

List<Articolo> r = new ZefiroContext().Articoli.ToList();