Clients.Client(someConnectionId).sayhello("....");

Clients.Clients(connectionIdsList).sayhello("....");

var watch = Stopwatch.StartNew();

 int actionId = db.CF_AccessLevel.Where(a => a.Name.ToLower().Trim() == "Edit").Select(a => a.CF_AccessLevelId).Single();

 int moduleItemId = db.CF_ModuleItem.Where(m => m.Title.ToLower().Trim() == "license".ToLower().Trim()).Select(m => m.CF_ModuleItemId).Single();

 int groupRoleId = db.Users.Where(u => u.UserId == 1).Select(u => u.UserRoleId).Single();

watch.Stop();
 var elapsedMs = watch.ElapsedMilliseconds;

var watch = Stopwatch.StartNew();
 var something = Task<int>.Factory.StartNew(() => db.CF_AccessLevel.Where(a => a.Name.ToLower().Trim() == "Edit").Select(a => a.CF_AccessLevelId).Single());
something.Wait();
int actionId = something.Result;

var something1 = Task<int>.Factory.StartNew(() => db.CF_ModuleItem.Where(m => m.Title.ToLower().Trim() == "license".ToLower().Trim()).Select(m => m.CF_ModuleItemId).Single());
 something1.Wait();
 int moduleItemId = something1.Result;

var something2 = Task<int>.Factory.StartNew(() => db.Users.Where(u => u.UserId == 1).Select(u => u.UserRoleId).Single());
 something2.Wait();
 int groupRoleId = something2.Result;
 watch.Stop();
 var elapsedMs = watch.ElapsedMilliseconds;

public class EfOurServiceService : IOurServiceService
    {
        readonly IUnitOfWork _uow;
        readonly IDbSet<OurService> _ourServices;
        readonly IDbSet<OurServiceCategory> _ourServiceCategories;
        public EfOurServiceService(IUnitOfWork uow)
        {
            _uow = uow;
            _ourServices = _uow.Set<OurService>();
            _ourServiceCategories = _uow.Set<OurServiceCategory>();
        }


public IList GetMasterDetailsFilterLang(string language)
        {
            var query = (_ourServiceCategories
                           .Where(c => (c.Language == language))
                           .Select(
                              c =>
                                 new
                                 {
                                     CatId=c.Id,
                                     CatName=c.Title,
                                     OurServices = c.OurServices
                                        .Select(
                                           o =>
                                              new
                                              {
                                                 ServId= o.Id,
                                                 ServName= o.Title
                                              }
                                        )
                                 }
                           ));

            var ss = query.ToList();

//در اینجا که در لایه سرویس در پروژه ای جداگانه است به ایتم‌های کوئری دسترسی کامل دارم
            foreach (var master in ss)
            {
                var s = master.CatId;
                foreach (var details in master.OurServices)
                {
                    var cc = details.ServName;
                }
            }

            return ss;
        }
}

public string CreateServiceMnu()
    {
        var ds = OurServiceService.GetMasterDetailsFilterLang(_LangSar);

        foreach (var master in ds)
        {
            var s = master.CatId;
            foreach (var details in master.OurServices)
            {
                var cc = details.ServName;
            }
        }
        return string.Empty;
    }