private IQueryable <Ls> SearchScenariosByKeyword(ScenarioParameters scenarioParameters)
        {
            IQueryable <Ls> ls = Enumerable.Empty <Ls>().AsQueryable();

            if (!string.IsNullOrWhiteSpace(scenarioParameters.Keyword.Trim()))
            {
                var keyword = keywordRepository.GetKeyword(scenarioParameters.Keyword);
                if (keyword != null)
                {
                    ls = context.Lskeyword.Where(x => x.Keywordid == keyword.Idkeyword)
                         .Select(x => x.Lsid)
                         .Select(x => context.Ls.Find(x))
                         .Select(x => x);
                    ls = ls.Where(x => x.LstypeId != (int)LsTypeEnum.Private && x.IsDeleted == false);
                }
            }
            return(ls);
        }