i want result groupby roleoperation.menuid
my linq code i wirte below code

 from roleoperation in db.RoleOperations
                             join menu in db.Menus
                                    on roleoperation.MenuId equals menu.Id
                            join asprols in db.aspnet_Roles
                                    on roleoperation.RoleId equals asprols.RoleId
                            join aspusers in db.aspnet_UsersInRoles
                                    on asprols.RoleId equals aspusers.RoleId
                            //where aspusers.UserId.Equals(userId) && roleoperation.IsVisible.Equals(true) && roleIds.Contains(roleoperation.RoleId)
                            where aspusers.UserId.Equals(userId) && roleIds.Contains(roleoperation.RoleId)
                            orderby menu.Sequence
                            group roleoperation by roleoperation.MenuId


                            select new ePP2PL.MenusProperties()
                        {
                            Id = menu.Id,
                            Pagename = menu.PageName,
                            Tooltip = menu.ToolTip,
                            Parentid = menu.ParentId,
                            Sequence = menu.Sequence,
                            Name = menu.Name,
                            ParentidName = menu.ParentId,
                            CRUDAllowed = menu.CRUDAllowed,
                            IsMandatory = menu.IsMandatory

                            //prementname = abc.Parentname

                        };

                   




            return menuData;

how can get result group by roleoperation menu id

write like this in ur application

public partial class employee
{
    public IEnumerable<employee> getemployee()
    {
        NorthwindDataContext db = new NorthwindDataContext();
        return db.employees.GroupBy(e => e.empname);
    }
}