public override string CombineValue() { string value = string.Join(",", First.CombineValue(), Second.CombineValue()); if (IncludeByPar) { return($"({value})"); } return(value); }
public override string CombineValue() { string op = IsAdd ? "+" : "-"; return($"{First.CombineValue()}{op}{Second.CombineValue()}"); }