Analysis of information sources in references of the Wikipedia article "Mono (phần mềm)" in Vietnamese language version.
Even if they aren't supporting it, they do own a product that is in direct competition with Xamarin's future offerings. Without some sort of legal arrangement between Attachmate and Xamarin, the latter would face the daunting prospect of proving that their new development doesn't use any the technology that the old one did. Considering that this is really just a wrapper around the native API, it would be hard to prove you had a clean-room implementation even for a team that wasn't intimately familiar with Attachmate's code.
The agreement grants Xamarin a broad, perpetual license to all intellectual property covering Mono, MonoTouch, Mono for Android and Mono Tools for Visual Studio. Xamarin will also provide technical support to SUSE customers using Mono-based products, and assume stewardship of the Mono open source community project.
Called the Mono Project, this effort encompasses creating a development environment that will allow applications developed for .Net to run on Linux systems as well as at Windows systems. Mono originated out of a need for improved development tools for the GNOME community and for Ximian specifically, according to Miguel de Icaza, Ximian's chief technical officer.
