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Asked: 2026-05-14T14:38:10+00:00

I am trying to create a regex that will take all files that do

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I am trying to create a regex that will take all files that do not have a list of extensions. In particular, I am trying to filter out filenames that end in .csv

I have browsed around for an hour and been unable to figure this out. I am using .NET Regex.

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1 Answer

  1. Editorial Team

    The following should do the trick. I just tested it with .net.

    ^.*\.(?!csv).*$

    Be sure to include the IgnoreCase RegexOptions to make it case insensitive.

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