private void WriteNewData(string filename) { ReadTxt readTxt = new ReadTxt() { FileName = filename }; var items = readTxt.GetWords(); if (items != null) { Config config = new Config(); if (File.Exists("words.json")) { config.ForbiddenWords = config.DeserializeWordsFromJson(); config.ForbiddenWords.AddRange(items); config.SeriailizeWordsToJson(); } else { config.ForbiddenWords = items; } config.SeriailizeWordsToJson(); wordViewModel.AllWords.AddRange(items); } }