No luck. I ended up spinning up a new site to handle this. The new site is in C# and I pretty much just used the Github demo to get it working. I redirect from my vb.net site to the c# site, handle the payment, and then send the user back to my site after the payment is completed. I wish that 20 years ago, I started created my site using C#.
On another note, the payload that is returned from the UC payment is pathetic. The UC doesn't even provide a place for the payor to enter their company name. I absolutely hate it. I wish I could continue to use tokenization. I am having to rewrite my entire application to support UC.
