Get all files in all subfolders by regexp mask in C#

GetAllFiles.cs

        private const string BaseDir = @"C:\Users\username\Desktop\dir";

        private static readonly Regex _files = new(
            @".*\.(xml)$",
            RegexOptions.IgnoreCase | RegexOptions.Compiled);

        private static readonly Regex _ignoredDir = new(
            "^(node_modules|bin|obj)$",
            RegexOptions.IgnoreCase | RegexOptions.Compiled);

        private static readonly Regex _ignoredContent = new(
            "^.{1,100}<auto-generated",
            RegexOptions.Singleline | RegexOptions.Compiled);

        private static IEnumerable<string> GetAllFiles(DirectoryInfo root)
        {
            foreach (var fileInfo in root.GetFiles("*.*"))
            {
                if (_files.IsMatch(fileInfo.Name))
                {
                    yield return (fileInfo.FullName);
                }
            }
            foreach (var dirInfo in root.GetDirectories())
            {
                if (!_ignoredDir.IsMatch(dirInfo.Name))
                {
                    foreach (var fullName in GetAllFiles(dirInfo))
                    {
                        yield return fullName;
                    }
                }
            }
        }