How to get a list of existing topics in an Azure EventGrid Domain in C

Question

In C#, what is the most efficient approach to get a list of subject names enclosed by an Azure EventGrid Domain?

It's simple enough to do using Azure-CLI, but I'm having trouble finding examples in C#. I looked at the EventGridManagementClient with the usage sample, but I believe there is too much overhead to get this to work, primarily because of credentials and authentication.