static bool MatchesKey(BiKeyFile biKeyFile, BiSignFile biSignFile) => biSignFile.KeyName.Equals(biKeyFile.KeyName, StringComparison.OrdinalIgnoreCase);
static bool MatchesKey(BiKeyFile biKeyFile, BiSignFile biSignFile) { return biSignFile.KeyName.Equals(biKeyFile.KeyName, StringComparison.InvariantCultureIgnoreCase); }