C＃regex无法通过管道分隔符拆分字符串

Question

string query = "A|B";

接下来的两行的输出等于"%A%|%B%"，而预期“A％B”！

query = Regex.Replace(query, "|", "%");
query = Regex.Replace(query, @"|", "%");

为什么？

Answer 1

The | is a special character of regexes, it means "or"。你必须逃脱它。

query = Regex.Replace(query, @"\|", "%");