A C# walkthrough of Gauss-Legendre quadrature that computes Legendre polynomial roots and weights at runtime instead of shipping precomputed tables. Bonnet's recurrence keeps the polynomial evaluation stable past degree 15, and Newton's method finds each root to about 1e-10 in a few iterations.
Microsoft retires .NET 8 and .NET 9 on November 10, 2026, leaving apps without security patches unless they move to .NET 10. A new deployment-first checklist shows how to inventory what is actually running, retarget with minimal risk and prove the migration with artifact-level testing and a rollback rehearsal.
Metalama 2027.0 introduces call-site interceptors that rewrite selected method calls at build time, so a method from a NuGet package or the .NET libraries can be wrapped without touching its source. The post walks through a retry example built from a T# template, a hand-written audit redirect, and the scoping rules. The feature is in preview from 2027.0.4-preview.
Critter Stack's new Bobcat 1.0 turns ordinary C# tests into readable executable specifications. The author starts from an existing xUnit test, adds step helpers, then covers decision tables and set verification for collections. It is a practical walkthrough for .NET teams who want reviewable tests without a Gherkin layer.
JasperFx rewrote the Wolverine best practices guide from scratch, replacing the 2023 version. The new guide centers on the A-Frame Architecture and gives concrete advice on splitting handlers, error handling, and at-least-once messaging rules. It is a practical reference for .NET teams building messaging systems with Wolverine.
JasperFx has released Bobcat 1.0, an MIT-licensed tool that projects human-readable specifications from the test frameworks you already use, including xUnit.net, TUnit, MSTest and NUnit. No Gherkin or wiki files are needed, only C# or F#. It also brings Supervisor for more reliable integration suites and telemetry output aimed at AI agents debugging failing tests.
Azure Cosmos DB Shell lets you browse databases, containers and items from the terminal. This walkthrough pairs the shell with the local Azure Cosmos DB Linux Emulator and the FleetCharge sample data to show connecting, navigating, querying and point reads. It is a practical way to check what your application actually stored during development, without opening the portal or adding diagnostic code.
JasperFx shipped a coordinated Critter Stack release wave: CritterWatch 1.1, Bobcat 1.0, AI Skills 1.17 and a Stoat 0.5.0 preview. CritterWatch's MCP server now exposes 83 tools, and Bobcat 1.0 turns existing test methods into executable specifications. Worth a look if you run Wolverine or Marten in production or write integration tests on the .NET stack.
Uno Platform's Matt Mattei explains how he checks code that AI agents write for .NET and Uno Platform apps. He combines written specs, runtime checks, lint hooks and change-cost probes. The post gives working .NET developers a concrete review checklist for agent-written features.
Xero.DataComparer is a small, dependency-free .NET library for non-regression testing of pricing and risk engines. Instead of a boolean verdict, it reports which rows differ, on which properties, and which rows are missing on either side. The author says it compares two lists of one million objects in about 0.7 seconds, and explains the design choices behind that speed.
Dennis Doomen released Mockly, an open-source library that makes testing code which calls HttpClient much simpler. It replaces hand-written HttpMessageHandler subclasses and fragile Moq setups on the protected SendAsync method. Its main strength is that failure paths such as retries, timeouts, 401 refreshes and 429 throttling can be simulated in a line or two, and unmatched requests produce a clear explanation.
Obfuscation turns into a release-engineering problem once you must rebuild, verify, or debug what shipped. The article proposes three contracts for Opaquer-protected releases: identity, integrity, and diagnostics. It gives .NET teams a practical checklist for keeping protected builds traceable and readable in production.