.NET 10 introduced new levels of performance and productivity, and the OpenTelemetry libraries for .NET evolved alongside it, giving developers the deep insights they need for application monitoring.

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Grafana Labs

Grafana Labs engineers worked with the OpenTelemetry .NET community to deliver native .NET 10 support for the OpenTelemetry instrumentation libraries on the same week as .NET 10's stable release in November 2025. The post covers the value of early preview validation (catching a logging source generator regression before RC2), key changes in the new release including schema URL support for metrics and traces, new ASP.NET Core metrics for authentication, Blazor, and memory pools, and a breaking change where the default trace context propagator switched to W3C. It also flags a binding redirect gotcha for .NET Framework apps using .NET 10 assemblies.

OpenTelemetry support for .NET 10: A behind-the-scenes look