Question

I have problem with saving many to many relationship.
When I run the code, my mapping table “dbo.UserTown” does not have any data saved in this any idea why?

I have wrote my function for saving the users with lists of towns

  public void Save(User user)
    {
        context.User.Add(user);
        context.SaveChanges();
    }

My classes are like this:

public class User
{
    public long UserId { get; set; }
    public String Nickname { get; set; }
    [InverseProperty("Residents")]
    public virtual ICollection<Town> Residencies { get; set; }
}

and

public class Town
{
    public long TownId { get; set; }
    public String Name { get; set; }
    public virtual ICollection<User> Residents { get; set; }
}

Answer 1

Stange but i have discovered next day:
I have done steps to clear problem:

1. Fresh mug of coffe 🙂
2. cleared all cashe in vs (clear all projects), Closed Visual Studio for sure
3. Removed database
4. Open VS and run project => this step created database
5. Important: did NOT changed my code
6. Run the project 2nd time to seed dummy data into system
7. My table is populated.

Real headscratcher…