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Any ideas why a charge transaction for the same token and same amount would fail via the API but succeed via the Authorize.net website ? When it failed via the API, it had an auth code of '000000' and a declined description of 'contact issuing bank'.

I'm using Visual Studio 2017 community. I'm trying to use the csharp sample apps from github, but they are not working properly. I'm wondering if there are any other sample apps out there. - prefer dot net / windows forms type app, but doesn't have t...