many-to-many

How can I detect changes of ICollection<> properties (many-to-many relationships)? public class Company { ... public virtual ICollection<Employee> Employees { get; set; } } using (DataContext context = new DataContext(Properties.Settings.Default.ConnectionString)) { Company company = context.Companies.First(); company.Employees.Add(context.Employees.First()); context.SaveChanges(); } public class DataContext : DbContext { public override int SaveChanges() { return base.SaveChanges(); // Company's entity state is "Unchanged" in this.ChangeTracker } } Here is how to find all the changed many-to

Ok so this is probably a trivial question but I'm having trouble visualizing and understanding the differences and when to use each. I'm also a little unclear as to how concepts like uni-directional and bi-directional mappings affect the one-to-many/many-to-many relationships. I'm using Hibernate right now so any explanation that's ORM related will be helpful. As an example let's say I have the following set-up: public class Person{ private Long personId; private Set<Skill> skills; //Getters and setters } public class Skill{ private Long skillId; private String skillName; //Getters and setters

I can't seem to make this work at all class Member { public virtual IList<Member> Friends { get; set; } [Key] public int MemberId { get; set; } public string Name{ get; set; } } I tried adding Mappings but in vain. Is there a way to do so with CTP5? By convention, Code First will take uni-directional associations as one to many. Therefore you need to use fluent API to let Code First know that you want to have a many to many self referencing association: protected override void OnModelCreating(ModelBuilder modelBuilder) { modelBuilder.Entity<Member>().HasMany(m => m.Friends).WithMany(); } Note: