▁additional ▁object - rel ational ▁tools ▁were ▁added , ▁such ▁as ▁the ▁Entity ▁Framework ▁included ▁with ▁the ▁ ▁. NET ▁Framework ▁ 3 . 5 . ▁LINQ ▁to ▁SQL ▁was ▁also ▁introduced ▁with ▁. NET ▁ 3 . 5 . ▁ ▁This ▁somehow ▁reduced ▁significance ▁and ▁popular ity ▁of ▁third - party ▁object - rel ational ▁libraries . ▁▁ ▁Entity ▁Framework ▁an ▁open ▁source ▁object - rel ational ▁mapping ▁( ORM ) ▁framework ▁for ▁A DO . NET . ▁ ▁It ▁was ▁a ▁part ▁of ▁. NET ▁Framework , ▁but ▁since ▁Entity ▁framework ▁version ▁ 6 ▁it ▁is ▁separated ▁from ▁. NET ▁framework . ▁N Hi bernate N Hi bernate ▁is ▁an ▁object - rel ational ▁ma pper ▁for ▁the ▁. NET ▁platform . ▁ ▁Notes ▁ ▁References ▁ ▁External ▁links ▁ ▁General : ▁ ▁. NET ▁Open ▁Source ▁Develop er ▁Project s , ▁a ▁list ▁maintained ▁at ▁GitHub ▁ ▁N umer ical ▁libraries : ▁ ▁The ▁Math ▁Forum ▁- ▁Math ▁L ibr aries , ▁an ▁extensive ▁list ▁of ▁mathematical ▁libraries ▁with ▁short ▁descri ptions ▁ ▁Guide ▁- ▁Math ▁and ▁Statistics ▁Program ming ▁with ▁F # ▁Data : ▁ ▁Object ▁Rel ational ▁M apping ▁ ▁Com parison ▁of ▁Object ▁Rel ational ▁M apping ▁Tools ▁for ▁the ▁. NET ▁Framework ▁ ▁Category : . NET ▁Framework ▁software ▁Category : Comput er ▁programming ▁tools ▁. NET ▁libraries ▁and ▁frameworks ▁Category : Comput er ▁libraries ▁Category : N umer ical ▁libraries ▁Category : Graphics ▁libraries ▁Category : Free ▁and ▁open - source ▁software <0x0A> </s> ▁California