/// <summary>
/// Checks the promo code.
/// </summary>
/// <param name="promoCodeslist">The result.</param>
/// <returns></returns>
public static string CheckPromoCode(List <string> promoCodeslist)
{
string uniqPromoCode = RandomHelpers.GetUniquePromoCode();
if (promoCodeslist != null)
{
againCheck:
var isExist = promoCodeslist.Contains(uniqPromoCode);
if (isExist)
{
uniqPromoCode = RandomHelpers.GetUniquePromoCode();
goto againCheck;
}
else
{
return(uniqPromoCode);
}
}
else
{
return(uniqPromoCode);
}
}
