Add C# build to Azure pipelines

[phlptp]

Is it possible to add a C# interface build to one of the Azure pipeline build 2017 or 2019.

[nightlark]

Probably, but without tests or a C# type maps file with language specific customization going on I don't think there's much value in adding it now, unless we are going to have a push to get the C# interface into a better state. Right now it would be running swig on the same shared *.i files that are used by the other interfaces.