Service Reference not working for AuthorizeNet

[james0987]

Service Reference not working for AuthorizeNet

Error 8 The type or namespace name 'AuthorizeNet' could not be found (are you missing a using directive or an assembly reference?) I am working in Quik Start. It looks really simple but I get the error message like AuthorizeNet Service reference is not even there...

[RaynorC1emen7]

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using AuthorizeNet;

forgot the using?