IDictionary< string，string>与字典< string，string> [英] IDictionary<string, string> versus Dictionary<string, string>

问题描述

这里使用IDictionary的价值是什么？

what is the value of using IDictionary here?

推荐答案

使用接口的值总是相同的：you don在切换到另一个后端实现时，不得不更改客户端代码。

The value of using an interface is always the same: you don't have to change client code when switching to another backend implementation.

考虑分析你的代码后来显示一个哈希表实现（在 Dictionary 类）不适合您的任务，并且二叉搜索树将表现更好。如果你已经编码到一个接口，然后切换实现是直接。然而，如果你使用了一个具体的类，你必须在更多的地方改变更多的代码。 =>这会花费时间和金钱。

Consider that profiling your code later shows that a hash table implementation (used in the Dictionary class) isn't suited for your task and that a binary search tree would perform better. If you've coded to an interface then switching the implementation is straightforward. If, however, you've used a concrete class, you've got to change a lot more code in a lot more places. => This costs time and money.

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