Right now, in order for telemetry to work, 3 NuGet packages need to be downloaded (or cached):

• Microsoft.ApplicationInsights (for Microsoft.ApplicationInsights.dll)
• Microsoft.Diagnostics.Tracing.EventSource.Redist (for Microsoft.Diagnostics.Tracing.EventSource.dll)
• Microsoft.Bcl.Async (for Microsoft.Threading.Tasks.dll)

In the end, the telemetry events are just being sent as web requests. While the web request format isn't documented, it should be possible to reverse-engineer via a tool like Fiddler.

If we can figure out how to make those web requests directly, then we can improve the first-run experience for users to not need to have that initial binary download.