F# 是由微软发展的为微软.NET语言提供运行环境的程序设计语言。它是基于Ocaml的，而Ocaml是基于ML函数程序设计语言的。 这是一个用于显示.NET在不同编程语言间互通的程序设计。微软计划将慢慢整合F#至.NET平台并使F#成为.NET平台的计算机辅助语言。-On the surface of things, that is an intuitively obvious statement, given the title of this book. However, despite the apparent redundancy in saying it aloud, the sentence above elegantly describes what this book is about: The authors are not attempting to teach developers how to accomplish tasks from other languages in this one, nor are they attempting to evangelize the language or its feature set or its use "over" other languages. They assume that you are considering this book because you have an interest in learning the F# language: its syntax, its semantics, its pros and cons, and its use in concert with other parts of the .NET ecosystem.