C#正则表达式匹配并包装多行

我需要制作这样的文本，例如

Founded in 2008, Stack Overflow sees 40 million visitors each month

|| <b>ID</b> || <b>Column1</b> || <b>Column2</b> ||
| | | |

Stack Overflow Documentation, the largest content expansion since Q&A, launches in July

|| <b>Name</b> || <u>Surname</u> || <u>DoB</u> ||
| | | |

The Developer Story launches in October, giving developers a better way to present their skills

但这不是我需要的，它选择了错误的区域，你可以在这里看到

另一个尝试是这样的

    Founded in 2008, Stack Overflow sees 40 million visitors each month

<span>|| <b>ID</b> || <b>Column1</b> || <b>Column2</b> ||
| | | |</span>

Stack Overflow Documentation, the largest content expansion since Q&A, launches in July

<span>|| <b>Name</b> || <u>Surname</u> || <u>DoB</u> ||
| | | |
| | | |
</span>

The Developer Story launches in October, giving developers a better way to present their skills

((^|\r\n{2,}|)+(\|{1,2}))(.*)(\|{1,2}(\r\n{2,}|$|)+)

|| A | B |
|| c | d |

Stack Overflow Documentation, the largest content expansion since Q&A, launches in July
<span>
|| <b>Name</b> || <u>Surname</u> || <u>DoB</u> ||
| | | |

<!-- not suppose to be wraped up -->
</span><span>||


| a | b | c | u |

</span>The Developer Story launches in October, giving developers a better way to present their skills
<span>
| a | b | c |
| d | e | f |</span>

但它最终选择了每一行，您可以在这里看到示例

我应该如何更改正则表达式以使其以正确的方式工作

UPD

Wiktor Stribiżew（感谢他）在评论中告诉我尝试他的例子，它在上面的例子中效果很好，但并非适用于所有可能的情况（这里的例子）

所谓的表可以是这样的

    Founded in 2008, Stack Overflow sees 40 million visitors each month

<span>|| <b>ID</b> || <b>Column1</b> || <b>Column2</b> ||
| | | |</span>

Stack Overflow Documentation, the largest content expansion since Q&A, launches in July

<span>|| <b>Name</b> || <u>Surname</u> || <u>DoB</u> ||
| | | |
| | | |
</span>

The Developer Story launches in October, giving developers a better way to present their skills

((^|\r\n{2,}|)+(\|{1,2}))(.*)(\|{1,2}(\r\n{2,}|$|)+)

|| A | B |
|| c | d |

Stack Overflow Documentation, the largest content expansion since Q&A, launches in July
<span>
|| <b>Name</b> || <u>Surname</u> || <u>DoB</u> ||
| | | |

<!-- not suppose to be wraped up -->
</span><span>||


| a | b | c | u |

</span>The Developer Story launches in October, giving developers a better way to present their skills
<span>
| a | b | c |
| d | e | f |</span>

或者

| a | b | c |
| d | e | f |

UPD2

那是一个很近的房间，但它有一个难看的空房间

UPD3

这个是close（），但是对于这个测试文本

Stack Overflow Documentation, the largest content expansion since Q&A, launches in July

|| <b>Name</b> || <u>Surname</u> || <u>DoB</u> ||
| | | |


||


| a | b | c | u |

The Developer Story launches in October, giving developers a better way to present their skills

| a | b | c |
| d | e | f |

将被解析为html，看起来像表，其中，

| | Cell | |

表示标题，

| Cell |

表示常规单元格

所以，在分析之后，它看起来像

<table>
  <tr>
    <th>ID</th>
    <th>Column1</th>
    <th>Column2</th>
  </tr>
  <tr>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
  </tr>
</table>

身份证件
专栏1
专栏2

正则表达式是

(\|\|?([^|\n\r]+\|\|?)+($|[\r\n]+))+

匹配组为

$0

（）

其工作原理如下：

(
  \|\|?         #the line starts with one or two pipes
  (
    [^|\n\r]+   #followed by at least one non-pipe characther
    \|\|?       #and the cell endt with one or two pipes
  )+            #at least one cell, otherwise even the line "||" would be matched
  (
    $           #the text ends (you are NOT in multiline mode) 
  |
    [\r\n]+     #or [\r\n] characters are matched (at least one, otherwise would match even "||A|B"), in order to match also the possible following line
  )
)+              #at least one line

如果不想匹配“table”后面的空格/新行，只需使用一个稍难的正则表达式（）：

---

在最后一个正则表达式中，请记住使用

m

标志。

好吧，您的预期输出似乎不正常，是否需要复制

| | |

？试试看，是的，好像是空的cells@DanilGholtsman这实际上是什么意思“是的，它就像一排空单元格”？哦，对不起，我会更新问题来解释that@WiktorStribiżew cool，它可以工作，我更新了它（因为它可以以

|

以及

|

开始或结束）