Substitution regex for adding spaces around braces. Works on regex101 but seems broken in Visual Studio...

bracing_spacing.regex

(""(?>[^""]|\\"")*?"")|(?!\( )(\()(?!\))(\1??(?>(?>""(?>[^""]|\\"")*?"")|.){4,})(\))(?<! \))
$1$2 $3 $4

For use in Visual Studio (.NET Regex Engine)

FEATURES
- Inserts space after opening and before closing parenthesis if contents between parentheses is longer than <x> (4 in this example)
- Does not do anything to strings
- Ignores parentheses that already have space
- Can be used multiple times to hit nested offenders

BUGS
- Inserts 2 spaces after some strings (could fix this if .NET had conditional replacements)