public bool Add(Abbreviation abbreviation) { if (String.IsNullOrEmpty(abbreviation.Mnemonic) || String.IsNullOrWhiteSpace(abbreviation.Mnemonic) || String.IsNullOrWhiteSpace(abbreviation.Expansion) || String.IsNullOrEmpty(abbreviation.Expansion)) { return false; } _abbreviationList[abbreviation.Mnemonic] = abbreviation; return true; }