.NET 11 Gives MemoryCache First-Class OpenTelemetry Metrics
.NET 11 Preview 4 ships a built-in meter for Microsoft.Extensions.Caching.Memory, so cache hit ratio and evictions flow into OpenTelemetry without a background poller.
Tag: opentelemetry
5 posts
Migrate from Serilog to OpenTelemetry logging in .NET 11
A step-by-step guide to moving a .NET 11 app off Serilog and onto OpenTelemetry logging: the low-risk Serilog.Sinks.OpenTelemetry bridge, the full Microsoft.Extensions.Logging cut-over, what breaks, how to verify, and how to roll back.
How to use OpenTelemetry with .NET 11 and a free backend
Wire OpenTelemetry traces, metrics, and logs into a .NET 11 ASP.NET Core app with the OTLP exporter, then ship them to a free, self-hosted backend: the standalone Aspire Dashboard for local dev, Jaeger and SigNoz for self-hosted production, and the OpenTelemetry Collector when you need both.
Aspire 13.2.4 Patches CVE-2026-40894: Baggage Header DoS in OpenTelemetry .NET
Aspire 13.2.4 ships an OpenTelemetry bump for CVE-2026-40894, a Gen0 allocation amplification in baggage, B3, and Jaeger propagator parsing. Update OpenTelemetry.Api and OpenTelemetry.Extensions.Propagators to 1.15.3 even if you are not on Aspire.
ASP.NET Core 11 Ships Native OpenTelemetry Tracing: Drop the Extra NuGet Package
ASP.NET Core in .NET 11 Preview 2 adds OpenTelemetry semantic attributes directly to HTTP server activity, removing the need for OpenTelemetry.Instrumentation.AspNetCore.