On the "Grains" view of the Orleans Dashboard I see the Labels(?) for Grains. See the red marked part in this picture:
What does it mean? If this is some kind of "Label" for the respective Grain, how can I add such a "Label" to my Grain programmatically in my C# code?
You can add custom labels only by creating your own fork of OrleansDashboard repository because it's implemented this way:
Use OpenTelemetry metrics instead of customizing the dashboard project.