Support adding links to Activity after it is created

[vishweshbankwar]

OpenTelemetry has added spec for supporting link addition to spans after the span is created. PR marking spec as stable - open-telemetry/opentelemetry-specification#3887.

This is currently not possible in .NET. Links can only be added when the activity is being created see this

Opening the issue for tracking as supporting this new feature would require addition of new API in System.Diagnostics.DiagnosticSource.

API Proposal

namespace System.Diagnostics
{
    public partial class Activity : IDisposable
    {
        public System.Diagnostics.Activity AddLink(System.Diagnostics.ActivityLink link);
    }
}

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Issue Details

---

OpenTelemetry has added experimental spec for supporting link addition to spans after the span is created. This is currently not possible in .NET. Links can only be added when the activity is being created see this

opening the issue for tracking as supporting this new feature would require addition of new API in System.Diagnostics.DiagnosticSource.

Author:	vishweshbankwar
Assignees:	-
Labels:	area-System.Diagnostics.Tracing
Milestone:	-

Tagging subscribers to this area: @dotnet/area-system-diagnostics-activity
See info in area-owners.md if you want to be subscribed.

Issue Details

---

OpenTelemetry has added experimental spec for supporting link addition to spans after the span is created. This is currently not possible in .NET. Links can only be added when the activity is being created see this

opening the issue for tracking as supporting this new feature would require addition of new API in System.Diagnostics.DiagnosticSource.

Author:	vishweshbankwar
Assignees:	-
Labels:	untriaged, area-System.Diagnostics.Activity
Milestone:	-

[tarekgh]

@vishweshbankwar I have marked this for future release till we get the OTel stable and then we can bring it back to current release as needed.

[hahn-kev]

I'm also interested in this, there's a library that I'd like to enrich an activity with a link but I can't since it's already been created.

[martinjt]

@tarekgh this has now been marked stable in the spec.

open-telemetry/opentelemetry-specification#3887