https://learn.microsoft.com/ja-jp/dotnet/api/system.text.regularexpressions.regexrunner.runtext?view=netframework-4.8.1&viewFallbackFrom=net-8.0
RegexRunner.runtext Field (System.Text.RegularExpressions) | Microsoft Learn
Used by a Regex object generated by the CompileToAssembly method.
field systemtextmicrosoftlearn