CLI标准库（ISO/IEC 23271）提供了可由多种语言使用的常见类型的集合。在CLI中添加了泛型之后，标准库已经扩展到包括许多常见的泛型类型，特别是集合。然而，目前，这些库并不包括许多不同语言中的简单泛型类型。任何使用这些通用类型的语言都必须实现它们，而不是依赖于CLI库，从而减少语言之间的交互- 可操作性。ISO/IEC TR 25438:2006通过提供一些常见类型来解决这个问题。

The CLI standard libraries (ISO/IEC 23271) provide a collection of common types that can be used by multiple languages. With the addition of generics to the CLI, the standard libraries have been extended to include a number of common generic types, in particular, collections. However, at present, these libraries do not include many simple generic types found in a number of different languages. Any language which uses these common types must implement them rather than deferring to the CLI library, thereby reducing language inter-operability. ISO/IEC TR 25438:2006 addresses this issue by providing a number of these common types.