Entity Framework Errors When Trying to Create Many-to-Many Relationships

Question

Entity Framework Errors When Trying to Create Many-to-Many Relationships

This is a quit question: 2 foreign keys in one table using entity structure

I am trying to figure out my relationship in these tables:

public class Event
{
    public int EventId { get; set; }
    public string EventName { get; set; }
    public string EventLocation { get; set; }
    public string EventType { get; set; }
    public string EventDate { get; set; } 

    public virtual ICollection<Dog> Dogs { get; set; }
    public virtual ICollection<Result> Results { get; set; }
}

public class Dog
{
    public int DogId { get; set; }
    public string Name { get; set; }
    public int Age { get; set; }
    public bool Checked { get; set; }
    public string DogImage { get; set; }

    [ForeignKey("Event")]
    public int EventId { get; set; }

    public virtual ICollection<Merit> Merits { get; set; }
    public virtual ICollection<Result> Results { get; set; }

    public virtual Event Event { get; set; }
}

public class Result
{
    public int ResultId { get; set; }
    public int Track { get; set; }
    public int Obedience { get; set; }
    public int Protection { get; set; }

    [ForeignKey("Dog")]
    public int DogId { get; set; }
    public virtual Dog Dog { get; set; }

    [ForeignKey("Event")]
    public int EventId { get; set; }      
    public virtual Event Event { get; set; }

}

From what I understand from the original question, I don't need my Event class to be able to hold a collection of dogs. Is it going over my head? I do not understand how to properly set this up so that each dog participates in many activities and for each event it will receive a score related to that particular event.

I also have this method in mine dbContext

:

protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
    modelBuilder.Entity<Event>()
    .HasRequired(c => c.Results)
    .WithMany()
    .WillCascadeOnDelete(false);
}

The error that occurs when trying to create an event is as follows:

Foreign key "FK_dbo.Dogs_dbo.Events_EventID" refers to an invalid table "dbo.Events".
Failed to create constraint. See previous errors.

Thank!

EDIT:

I used to use this code to add dogs to an event:

 [HttpPost]
        public ActionResult DogsInEvent(DogsInEventVm model)
        {
            var choosenEvent = _ef.SingleEvent(model.ChoosenEvent.EventId);
            choosenEvent.Dogs =  new Collection<Dog>();
            choosenEvent.Dogs = model.Dogs.Where(o => o.Checked).ToList();
            _ef.AddDogsToEvent(choosenEvent);

            return RedirectToAction("AllEvents");
        }