this article needs to be
updated. ( march 2016)
diagram of mono architecture
original author(s) ximian developer(s) and .net foundation (a xamarin subsidiary) microsoft initial release june 30, 2004 stable release
/ january 15, 2020
 preview release
/ november 15, 2019
github .com /mono /mono written in , c , c# xml operating system , windows , macos linux platform , ia-32 , x64 , ia-64 , arm , mips , powerpc , sparc s390 type software framework license mit license  website mono-project .com mono is a project to create an free and open-source standard-compliant ecma -compatible .net framework , including a software framework c# and a compiler . originally by common language runtime , it was later acquired by ximian , and is now being led by novell , a subsidiary of xamarin microsoft and the  . the stated purpose of mono is not only to be able to run microsoft .net applications .net foundation , but also to bring better development tools to linux developers. cross-platform mono can be run on many  including software systems , most android , linux distributions , bsd , macos , windows , and even some game consoles such as solaris , playstation 3 , and wii .
the mono project has been controversial within the open-source community, as it implements portions of .net framework that may be covered by microsoft
. although standardized portions of .net framework are covered under patents —a covenant stating that microsoft will not assert its patents against implementations of its specifications under certain conditions—other portions are not, which led to concerns that the mono project could become the target of microsoft open specification promise lawsuits. following microsoft's open-sourcing of several core .net technologies since 2014 and its acquisition of xamarin in the beginning of 2016, an updated patent promise has been issued for the mono project ( patent infringement § mono and microsoft's patents).
the logo of mono is a stylized
's face, monkey mono being for spanish monkey.