protected void ButtonOpdater_Click(object sender, EventArgs e)
    {
        int categoriId = Convert.ToInt32(Request.QueryString["categori"]);
        //int brugerid = Convert.ToInt32(Session["user_id"]);

        var usersToDelete = new List<int>();
        foreach (ListItem user in ListBox_Redaktorer.Items)
        {
            if (user.Selected)
            {
                usersToDelete.Add(Convert.ToInt32(user.Value));

            }
        }

        db.category_editors.DeleteAllOnSubmit(db.category_editors.Where(i => usersToDelete.Contains(i.id)));
        db.SubmitChanges();

        foreach (ListItem user in ListBox_NotRedaktorer.Items)
        {
            if (user.Selected) //<----- HUSK DET ELLERS FLYTTER DEN ALT ANDET OGSÅ!!!
            {
                var categoryEditor = new category_editor();
                categoryEditor.fk_categories_id = categoriId;
                categoryEditor.fk_users_id = Convert.ToInt32(user.Value);

                db.category_editors.InsertOnSubmit(categoryEditor);
            }
        }

        db.SubmitChanges();

        Response.Redirect("~/Admin/Editors.aspx?categori=" + categoriId);
    }
 partial void Deletecategory_editor(category_editor instance);
 partial void Updatecategory_editor(category_editor instance);
 partial void Insertcategory_editor(category_editor instance);
	private void detach_category_editors(category_editor entity)
	{
		this.SendPropertyChanging();
		entity.category = null;
	}
	private void attach_category_editors(category_editor entity)
	{
		this.SendPropertyChanging();
		entity.user = this;
	}