使用Linq对对象进行操作，如何创建< string，string>的空字典.容易地? [英] Using Linq to objects, how to create an empty dictionary of <string, string> easily?

问题描述

要创建一个空序列，请使用以下

To create an empty sequence one uses the following

var empty = Enumerable.Empty<string> ();

是否有这么简单的方法来创建空字典?

Is there an equivalent for creating an empty dictionary as easily as this?

推荐答案

没有等效的方法...

No there is no equivalent...

Enumerable.Empty<T>()的目的是返回空数组的缓存"实例.因此，您可以避免创建新数组(return new T[0];)的开销.

The purpose of Enumerable.Empty<T>() is to return a "cached" instance of an empty array. So you can avoid the overhead of creating a new array (return new T[0];).

您不能将其转换为类似IDictionary<TKey, TValue>或Dictionary<TKey, TValue>的非只读结构，因为返回的实例以后可能会被修改，从而使目的无效.

You cannot translate this to a non-readonly structure like a IDictionary<TKey, TValue> or Dictionary<TKey, TValue> since the returned instance might be modified later and would therefore invalidate the purpose...

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