/// <summary>
/// Checks the invoice identifier.
/// </summary>
/// <returns></returns>
public static string CheckInvoiceId(List <string> invoiceIds)
{
string uniqId = RandomHelpers.GetUniqueOrderInvoiceId();
if (invoiceIds != null)
{
againCheck:
var check = invoiceIds.Contains(uniqId);
if (check)
{
uniqId = RandomHelpers.GetUniqueOrderInvoiceId();
goto againCheck;
}
else
{
return(uniqId);
}
}
else
{
return(uniqId);
}
}