public static int GetSystemIDByBrand(MijnBrand brand)
    {
        var systemID = 1;

        switch (brand)
        {
            case MijnBrand.Default:
                systemID = 1;
                break;
            case MijnBrand.Corendon:
                systemID = 1;
                break;
            case MijnBrand.CorendonBENL:
                systemID = 2;
                break;
            case MijnBrand.CorendonBEFR:
                systemID = 3;
                break;
            case MijnBrand.CorendonDE:
                systemID = 4;
                break;
            case MijnBrand.Stip:
                systemID = 6;
                break;
            case MijnBrand.Gofun:
                systemID = 5;
                break;
            case MijnBrand.KarinsChoice:
                systemID = 7;
                break;
            case MijnBrand.Makroreizen:
                systemID = 8;
                break;
            case MijnBrand.CorendonDK:
                systemID = 9;
                break;
            case MijnBrand.CorendonSE:
                systemID = 10;
                break;
            default:
                systemID = 1;
                break;
        }

        return systemID;
    }