问MVC中的关系

EN

// Threads
public class Thread
{
    [Key]
    public int Id { get; set; }

    public string Name { get; set; }

    public int NumberOfMessages { get; set; }

    public int ViewCount { get; set; }

    public string[] Tags { get; set; }

    public DateTime LastEdited { get; set; }

    public int Vote { get; set; }

    // Other model relations
    public virtual ICollection<Message> Messages { get; set; }
    public virtual Group Group { get; set; }
    public virtual ForumUser User { get; set; }
}

                thread.Group.Id = groupId;

`               // Saving the message in the database
                forumDb.Messages.Add(block);
                forumDb.Threads.Find(threadId).Messages.Add(block);
                forumDb.SaveChanges();
            }`