private void detach_Members(Member entity)
		{
			this.SendPropertyChanging();
			entity.State = null;
		}
 public void Delete(Member member)
 {
     _db.Members.DeleteOnSubmit(member);
     _db.SubmitChanges();
 }
		private void attach_Members(Member entity)
		{
			this.SendPropertyChanging();
			entity.State = this;
		}
 public void Add(Member member)
 {
     _db.Members.InsertOnSubmit(member);
     _db.SubmitChanges();
 }