本文探讨了F#语言中使用记录(structural types)而非传统对象数据结构的优点：类型推断简化开发；字段默认不可变增强安全性；不可继承保证未来安全性；可用于模式匹配；以及免费获得结构性比较和平等语义。
You can easily create properties and methods in F#, so why use a record? Records offer several distinct advantages over traditional object-oriented data structures:
• Type inference can infer a record’s type. No need for superfluous type annotations.
• Record fields are immutable by default, whereas class types offer no safety guarantee.
• Records cannot be inherited, giving a future guarantee of safety.
• Records can be used as part of standard pattern matching; classes cannot without resorting to active patterns or when guards.
• Records (and discriminated unions) get structural comparison and equality semantics for free.
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