Both ASP.NET Core and .NET MAUI added new built-in metrics for Identity, Blazor, and layout performance monitoring in .NET 10. It's high time to take a closer look at observability (or "o11y" to use a fancy numeronym) for local debugging and monitoring of production environments.

This live-coding session covers not only the three pillars of observability — logs, metrics, and (distributed) traces — but also its implementation in .NET in general and specific application models in particular. Moreover, we uncover the OpenTelemetry (OTel) standard, observe processes locally through CLI-based .NET tools and Aspire dashboards, and monitor deployed applications via Sentry.

The insights gained from this talk will help you to gain insights into your every .NET app to make error detection less painful and perhaps even aid in preventing problems in the first place.