We have Microsoft Dynamics NAV 2013 R2 and we plan to integrate your Authorize.net SDK/API into our system.  We basically only want to send Credit Card Payment Transactions from our NAV to Authorize.net so we don't have to always go to your site to charge our customers.  I have downloaded your csharpsample code as well as the dotnet sample code.  But I was wondering if you have any suggestions on how to implement this.  I am now thinking perhaps, use your SDK and call from our NAV.  If it's a dll, i can just drop it in the service and call from our C/AL code.  Please help.