This post marks the start of what I expect will be a long-term effort to explore the inner workings of .NET, expose the “magic” behind the scenes, and explain the mechanisms and underlying components of the .NET execution model. Today, we begin with a brief introduction to the .NET muxer (dotnet.exe). Note: These posts are […]
Implementing ASP.NET Core Automatic Span (Activity) Linking for Internal Redirects with Middleware on .NET 9
Today, I’ll continue a current theme for my content based on my experiences implementing OpenTelemetry instrumentation in practice for .NET applications. In this post, I want to focus on a minor enhancement I recently added to a project that enables span links between request traces on ASP.NET Core during internal redirects. NOTE: This code relies […]
An Efficient Dictionary for IPAddress Tracking using .NET 9 with AlternateLookup and IAlternateEqualityComparer
In this post, I will introduce and demonstrate enhancements to collections in .NET 9 and C# 13 for low-allocation code paths. Specifically, I will demonstrate using a custom IAlternateEqualityComparer and the AlternateLookup on a Dictionary used for efficiently tracking IP address information, keyed on the bytes of IP addresses. My use case, the basis for […]
Receiving GitHub Webhooks When Using the ASP.NET Core Developer Certificate
SERIES: A Guide to Developing GitHub Apps on .NET For the last couple of weeks, I have been experimenting with creating a GitHub App using .NET. I’ve been pursuing this because I have an idea for an integration that could be interesting, and it also provides a real-world scenario to keep my skills fresh. I […]
Disabling Recording of an Activity (span) in .NET OpenTelemetry Instrumentation
I’ve recently been building some hobby code to dogfood the various observability tooling we develop at Elastic. Additionally, I’ve been interested in identifying the pain points of using our products as well as the .NET instrumentation libraries (from System.Diagnostics) used to instrument code in an OpenTelemetry-compatible way. Recording Activities in .NET In today’s short post, […]