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Xamarin
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<p>Xamarin is a Microsoft-owned <a href="/facts/San_Francisco/cb9l7hbC">San Francisco</a>-based software company founded in May 2011 by the engineers that created <a href="/facts/Mono_(software)/PlyeJxRS">Mono</a>, <a href="/facts/Mono_(software)/PlyeJxRS">Xamarin.Android</a> (formerly Mono for Android) and <a href="/facts/Mono_(software)/PlyeJxRS">Xamarin.iOS</a> (formerly MonoTouch), which are <a href="/facts/Cross-platform/16zqdvNR">cross-platform</a> implementations of the <a href="/facts/Common_Language_Infrastructure/mu44u01J">Common Language Infrastructure</a> (CLI) and Common Language Specifications (often called Microsoft .NET). </p><p>With a <a href="/facts/C_Sharp_(programming_language)/UC2gxeyb">C#</a>-shared codebase, developers can use Xamarin tools to write <a href="/facts/Native_(computing)/yNez4jAK">native</a> <a href="/facts/Android_(operating_system)/nNyHb0xz">Android</a>, <a href="/facts/IOS/mK5cggH5">iOS</a>, and <a href="/facts/Windows/bwhAhuSL">Windows</a> <a href="/facts/Mobile_app/r7vp6meo">apps</a> with native <a href="/facts/User_interface/e9sPEWVD">user interfaces</a> and share code across multiple platforms, including <a href="/facts/Windows/bwhAhuSL">Windows</a>, <a href="/facts/MacOS/Y93vVpTm">macOS</a>, and <a href="/facts/Linux/9FvCKSTq">Linux</a>. According to Xamarin, over 1.4 million developers were using Xamarin's products in 120 countries around the world as of April 2017. </p><p>On February 24, 2016, Microsoft announced it had signed a definitive agreement to <a href="/facts/List_of_mergers_and_acquisitions_by_Microsoft/F34A1AhH">acquire</a> Xamarin. </p><p>Microsoft ended support for Xamarin on May 1, 2024 in favor of <a href="/facts/.NET_MAUI/Igdd6vw8">.NET MAUI</a>. </p>