▁features ▁for ▁the ▁Universal ▁Windows ▁Platform ▁( U WP ). ▁At ▁the ▁Microsoft ▁Connect ▁event ▁on ▁December ▁ 4 , ▁ 2 0 1 8 , ▁Microsoft ▁announced ▁re le asing ▁of ▁Win UI ▁as ▁open ▁source ▁project ▁on ▁GitHub . ▁Win UI ▁has ▁become ▁available ▁for ▁projects ▁target ing ▁the ▁. NET ▁Core ▁framework . ▁It ▁is ▁released ▁under ▁the ▁M IT ▁License . ▁However , ▁the ▁library ▁is ▁still ▁available ▁only ▁on ▁Windows ▁platform . ▁ ▁Prop ri et ary ▁GUI ▁▁ ▁X amarin . Forms ▁a ▁cross - platform ▁UI ▁tool kit ▁for ▁development ▁of ▁native ▁user ▁interfaces ▁that ▁can ▁be ▁run ▁on ▁iOS , ▁Android , ▁and ▁Universal ▁Windows ▁Platform ▁apps . ▁ ▁Qu ality ▁ass urance ▁▁ ▁N Unit ▁an ▁open ▁source ▁unit ▁testing ▁framework ▁for ▁. NET , ▁written ▁in ▁C # ▁and ▁thus ▁cross - platform . ▁It ▁is ▁one ▁of ▁many ▁programs ▁in ▁the ▁x Unit ▁family . ▁Lic ensed ▁under ▁M IT ▁License . ▁ ▁Object - rel ational ▁mapping ▁ ▁. NET ▁Framework ▁n atively ▁provides ▁util ities ▁for ▁object - rel ational ▁mapping ▁through ▁A DO . NET , ▁a ▁part ▁of ▁. NET ▁stack ▁since ▁. NET ▁ 1 . 0 . ▁In ▁addition , ▁a ▁number ▁of ▁third - party ▁object - rel ational ▁libraries ▁have ▁emer ged , ▁especially ▁in ▁earlier ▁years ▁of ▁the ▁. NET ▁development , ▁in ▁order ▁to ▁fill ▁some ▁perce ived ▁g aps ▁of ▁the ▁framework . ▁ ▁As ▁the ▁framework ▁has ▁evol ved ,