VS (15.7.3 and 15.8 Preview 2) uses guid as class name for ONNX model exported from customvision.ai

[tamirdresher]

I followed the steps in the README and the after importing the onnx file, the generated code contains GUID as part of the classes names.

I posted the issue here as well: microsoft/vs-tools-for-ai#21

It makes the demo a little ugly