private void AddResourcesToList(string key, IEnumerable <string> input, IList <KeyValuePair <string, string> > values) { if (input != null) { var inputList = input.Where(i => i != null).ToList(); if (inputList.Any()) { var inputString = UtilsHelper.FlattenList(inputList); values.Add(new KeyValuePair <string, string>(key, inputString)); } } }