public string Build()
{
var text2 = !string.IsNullOrEmpty(LeaderText2) ? $"_{LeaderText2.ToFixLength(21)}" : "";
var text3 = !string.IsNullOrEmpty(LeaderText3) ? $"_{LeaderText3.ToFixLength(21)}" : "";
return($"{LineCode}_{Birthday.ToFixLength()}_{Sex.ToFixLength(1)}_{LeaderText1.ToFixLength(31)}{text2}{text3}{LF}");
}
