FWIW .NET tooling telemetry can be easily opted-out, which the SDK explicitly tells you about, and there is a page that has full list of the kind of data that is collected (CLI usage metrics and tooling crash stack traces). You can also review the metrics yourself.

About: https://learn.microsoft.com/en-us/dotnet/core/tools/telemetr...

Collected metrics: https://dotnet.microsoft.com/en-us/platform/telemetry

Source code: https://github.com/dotnet/sdk/tree/main/src/Cli/dotnet/Telem...

In either case, many teams have CIs with 'DOTNET_CLI_TELEMETRY_OPTOUT=1' and call it a day even if it makes no difference to them.