regex - 在正则表达式中单独离开

Question

我正在使用 C# 正则表达式。

我如何匹配（任何较低的上部和/或 &）

A & E    ==> Should leave this as is
a & e    ==> Should leave this as is

而不是这个

A &#1234 B ==> Should convert to A B

A&#1234 B ==> Should convert to A B

Answer 1

看起来您真的只想从字符串中删除 &#Digit？

new Regex(" ?&#[0-9]+").Replace("A&#1234", "")