Contains Example

            string EDUIDS1 = "1,2,3,4,";
            var aaa = entity.tbl_Education.Where(k => EDUIDS1.Split(',').Select(x => int.Parse(x)).ToList().Contains(k.EDU_ID))
                                       .Select(k => new  { EDU_ID = k.EDU_ID, EDU_Name = k.EDU_Name }).ToList();


 var ListOfRefIds = LitRefs.Select(x => x.EvidenceId).ToList();


                var ExistedRefs = entity.AC_tbl_Rel_Topic_References.Where(x => x.TopicID == topicId).Select(i => i.LitReferenceID).ToList();
                var NewlyRefIds = ListOfRefIds.Where(x => !ExistedRefs.Contains(x)).ToList();


 var DetailsRefs = newmodel.Where(x => NewlyRefIds.Contains(x.EvidenceId)).Select(c => new { EvidenceId = c.EvidenceId, CNO = c.CNO }).ToList();