protected override void BeginProcessing() { if (ExcludeLanguage == null || !ExcludeLanguage.Any()) { ExcludeLanguageWildcardPatterns = new List <WildcardPattern>(); } else { ExcludeLanguageWildcardPatterns = ExcludeLanguage.Select( language => new WildcardPattern(language, WildcardOptions.IgnoreCase | WildcardOptions.CultureInvariant)) .ToList(); if (Language == null || !Language.Any()) { Language = new[] { "*" }; } } var langsList = Language?.Aggregate((seed, curr) => seed + ", " + curr) ?? "not specified"; var excludedLangsMessage = (ExcludeLanguage == null || ExcludeLanguage.Length == 0) ? "" : $"excluding {ExcludeLanguage.Aggregate((seed, curr) => seed + ", " + curr)} language(s)"; confirmMessage = $"R{(Recurse ? "ecursively r" : "")}emove versions for language(s) '{langsList}' {excludedLangsMessage}"; if (Version != null && Version.Any()) { VersionPatterns = Version.Select( version => new WildcardPattern(version, WildcardOptions.IgnoreCase | WildcardOptions.Compiled)) .ToList(); } else { VersionPatterns = new List <WildcardPattern>(); } base.BeginProcessing(); }