public string ToQueryString()
{
var queryParts = new List <string>();
AddIfNotNull(Books.ToQueryString(BooksQueryKey));
AddIfNotNull(Parts.ToQueryString(PartsQueryKey));
AddIfNotNull(Footwork.ToQueryString(FootworkQueryKey));
AddIfNotNull(Targets.ToQueryString(TargetsQueryKey));
AddIfNotNull(Measure.ToQueryString(MeasureQueryKey));
AddIfNotNull(Techniques.ToQueryString(TechniquesQueryKey));
AddIfNotNull(Weapons.ToQueryString(WeaponsQueryKey));
AddIfNotNull(Guards.ToQueryString(GuardsQueryKey));
AddIfNotNull(StartingGuards.ToQueryString(StartingGuardsQueryKey));
return(string.Join("&", queryParts));
void AddIfNotNull(string?value)
{
if (value != null)
{
queryParts.Add(value);
}
}
}