Mono is implemented based on UNIX .NET Framework development platform. Mono means "monkeys" in Spanish.
The Mono project is very large, which includes C # compilers, CLR engines, compatible .NET Framework class libraries (support ADO.NET and ASP.NET, etc.), third-party libraries GTK # (GTK tool set .NET implementation), There is even beautiful IDE, debug tools, and document browsers. From the current situation, Mono is far from mature. Although some sites have been built on Mono, it is not accepted by most people. This is the reason why there is both efficient efficiency, and the reason is there.
Reference article:
Mono: It turns out that you are the moon
Mono: from monkeys to Qi Tian Dasheng