open-telemetry/opentelemetry-dotnet

Add prototype support for bound instruments to the metrics API

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#7,236 opened on May 1, 2026

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help wantedmetricspkg:OpenTelemetry

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Description

See https://github.com/open-telemetry/opentelemetry-specification/issues/4126 for more details about Bound Instruments.

From https://github.com/open-telemetry/opentelemetry-specification/pull/5050#discussion_r3173976005:

I think OTel .NET Sdk can now do a prototype without needing any change from (.NET) runtime

Contributor guide

Research direction
Review the specification issue (https://github.com/open telemetry/opentelemetry specification/issues/4126) and the PR discussion (https://github.com/open telemetry/opentelemetry specification/pull/5050#discussion r3173976005). Then implement a prototype for bound instruments in the OpenTelemetry .NET metrics API, ensuring it aligns with the spec without requiring runtime changes.
Tech stack
csharp
Domain
observabilityapi
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
C#OpenTelemetry metrics
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30