.net - StringComparer.OrdinalignoreCase 和 StringComparer.InvariantCultureIgnoreCase 的关系

Question

我试图在使用StringComparer.OrdinalignoreCaseand时获取字符串比较结果之间的关系StringComparer.InvariantCultureIgnoreCase。更准确地说，我想知道以下四种说法中哪一种是正确的：

1. a == b using StringComparer.OrdinalIgnoreCase， 然后a == b using StringComparer.InvariantCultureIgnoreCase
2. a != b using StringComparer.OrdinalIgnoreCase， 然后a != b using StringComparer.InvariantCultureIgnoreCase
3. a == b using StringComparer.InvariantCultureIgnoreCase， 然后a == b using StringComparer.OrdinalIgnoreCase
4. a != b using StringComparer.InvariantCultureIgnoreCase， 然后a != b using StringComparer.OrdinalIgnoreCase

到目前为止，我知道第 3 条陈述是不正确的，因为这个问题中的评论的例子a = STRASSE和评论。b = Straße

理想情况下，我想解释为什么一个陈述是正确的，或者一个不正确的例子。

Answer 1

The difference between Ordinal and Invariant collation is the difference between non-linguistic and linguistic collation.

In theory 1 should be true (it is if you do not ignore case) but the casing rules are different when you use non-linguistic casing and linguistic casing. The rest are false.