https://learn.microsoft.com/ja-jp/dotnet/api/system.text.regularexpressions.regex.matchtimeout?view=netframework-4.8.1&viewFallbackFrom=net-6.0
Regex.MatchTimeout Property (System.Text.RegularExpressions) | Microsoft Learn
Gets the time-out interval of the current instance.
property systemregextextmicrosoftlearn