Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: A watan Agusta 2000, Microsoft, Hewlett-Packard, da Intel sun yi aiki don daidaita Tsarin Harshen Harshen Harshe (CLI) da C #. Zuwa Disamba 2001, an tabbatar da ƙa'idodin Ecma International (ECMA). Ƙungiyar Ƙasa ta Duniya (ISO) ta biyo baya a watan Afrilu 2003. Tsarin ISO na yanzu shine ISO / IEC 23271: 2012 da ISO / IEC 23270: 2006.Yayin da Microsoft da abokan hulɗarsu ke riƙe da takaddun shaida don CLI da C #, ECMA da ISO suna buƙatar cewa duk takaddun shaida masu mahimmanci don aiwatarwa su kasance a ƙarƙashin "sharuɗɗa masu dacewa da rashin nuna bambanci". Kamfanonin sun yarda su cika waɗannan sharuɗɗan, kuma su ba da haƙƙin mallaka kyauta. Koyaya, wannan bai shafi ɓangaren.NET Framework wanda ba a rufe shi da ƙa'idodin ECMA-ISO ba, wanda ya haɗa da Windows Forms, ADO.NET, da ASP.NET. Patents da Microsoft ke riƙe a cikin waɗannan yankuna na iya hana aiwatar da waɗanda ba Microsoft ba na cikakken tsarin.A ranar 3 ga Oktoba, 2007, Microsoft ta ba da sanarwar cewa lambar tushe don ɗakunan karatu na.NET Framework 3.5 za ta kasance a ƙarƙashin lasisin tushe na Microsoft (Ms-RSL). Asalin lambar tushe ya kasance a kan layi a ranar 16 ga Janairu, 2008 kuma ya haɗa da BCL, ASP.NET, ADO.NET, Windows Forms, WPF, da XML. Scott Guthrie na Microsoft ya yi alkawarin cewa ana ƙara ɗakunan karatu na LINQ, WCF, da WF.  Tambaya: Yaushe aka amince da su?
Disamba na shekara ta 2001