"Required members with SetsRequiredMembers attribute"

public class VehicleMetadata {
	public required DateOnly ManufactureDate { get; init; }
	public required bool IsTaxed { get; init; }
	public required VehicleClass Class { get; init; }

	public VehicleMetadata() { } // Leave the default constructor still available

	// This is a new helper ctor that sets all three properties from an official government 'vehicle code' string
	[SetsRequiredMembers]
	public VehicleMetadata(string governmentalDatabaseMetadataCode) {
		var split = governmentalDatabaseMetadataCode.Split('-');
		ManufactureDate = new DateOnly(Int32.Parse(split[0]), Int32.Parse(split[1]), Int32.Parse(split[2]));
		IsTaxed = Boolean.Parse(split[3]);
		Class = Enum.Parse<VehicleClass>(split[4]);
	}
}

static void Test() {
	var m = new VehicleMetadata("1990-01-19-True-Car");
}