.NET Regex无法识别的分组构造

Question

I am trying to translate a regex from Python to C#, but i am having some problems as i keep getting the error Unrecognized grouping construct.

^(?:\[(?P<release_group>.+?)\][ ._-]*)
(?P<series_name>.+?)[ ._-]+
(?P<ep_ab_num>\d{1,3})
(-(?P<extra_ab_ep_num>\d{1,3}))?[ ._-]+?
(?:v(?P<version>[0-9]))?
(?:[\w\.]*)
(?:(?:(?:[\[\(])(?P<extra_info>\d{3,4}[xp]?\d{0,4}[\.\w\s-]*)(?:[\]\)]))|(?:\d{3,4}[xp]))
(?:[ ._]?\[(?P<crc>\w+)\])?
.*?

What is giving me the error Unrecognized grouping construct in this regex?

Answer 1

(?P<groupname>...) becomes (?<groupname>...) in .NET regexes. Just remove the P . Same semantics.