C#正则表达式无法通过管道分隔符分割字符串[重复]

Question

string query = "A|B";

接下来两行的输出等于"%A%|%B%"，而“A%B”是预期的！

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, @"\|", "%");