Remove column header for optional property if no values

[tanuki-billie]

Hi all,
I am working on a plugin for a program that exports a schedule of building hangers. All hangers have either 1 or 2 rods, and each rod has a thread length. 99% of the time, the thread lengths are the same if the hanger has two rods. Thus, this is how my data is structured:

internal struct HangerScheduleData
{
    public string HangerType { get; set; }
    public string Size { get; set; }
    public string Service { get; set; }
    [Name("Thread Length")]
    public string ThreadLength { get; set; }
    [Name("Secondary Thread Length"), Optional]
    public string SecondaryThreadLength { get; set; }
}

All fields are required, except for the secondary thread length. Is it possible to skip writing the header for SecondaryThreadLength if, within a list of records, none of the records have a value for this? (the value is set to null by default)