Martin Stühmer

Hello there, I’m Martin, software architect and developer from the Stuttgart region. Right from the start of my professional career, I decided in favor of .NET and Microsoft technologies and tools and have always incorporated them into my work. With more than 15 years of experience in the field of software architecture and development with .NET, my focus is particularly on increasing the quality and performance of development teams, the interaction of the software solution with the target environment and the actual application down to the last byte.

In my position as Director Consulting Services @ CGI, I act as enterprise architect and developer for cloud native and .NET solutions. I am also a trainer for cloud and software architecture. In addition to my professional life, I am involved in the open source communities and currently provide them with various NuGet packages with different focuses and functionalities.

A strong willingness to learn and develop is also part of my everyday life. This was taken to a new level for me in 2021 after I successfully completed my IHK trainer and my Microsoft certified trainer this year. In addition, I was able to qualify as a trainer for CGI’s Risk and Cost Driven Architecture program in 2022.

Published blogs

.NET 10: Timing Is the New Technical Debt

2025 reshapes the .NET ecosystem with faster release cycles and shared responsibility. Discover why migrating to .NET 10 by Q1 2026 — and supporting your dependencies — turns timing into sustainable ROI.

.NET 10 and the Release Cycle Paradox

.NET’s yearly rhythm has become a symbol of stability — yet also a source of pressure. The release cycle paradox describes the tension between predictability and exhaustion: a release schedule that keeps the ecosystem healthy, but teams constantly catching up.

With .NET 10 on the horizon, developers must learn to navigate this rhythm rather than fight it.

Stop Breaking Multi-Targeting Builds with String Comparisons

String-based TargetFramework conditions fail silently in multi-targeting builds. IsTargetFrameworkCompatible() understands framework semantics and prevents production nightmares.

Modern Defensive Programming in .NET — Unified Throw-Helpers and Multi-Framework Compatibility

Modern .NET introduces powerful throw-helper methods such as ArgumentNullException.ThrowIfNull and ArgumentException.ThrowIfNullOrEmpty to simplify defensive programming. However, many projects still target older frameworks where these APIs are missing. This article explores how the NetEvolve.Arguments library delivers a unified, backward-compatible API that brings modern guard clause patterns to every .NET version, ensuring consistent validation, maintainability, and multi-framework compatibility.

Your Tests Are Lying — Mutation Testing in .NET

It begins like many stories in software: a well-intentioned developer joining a project, determined to do things properly. You arrive at a codebase that has grown organically, perhaps even chaotically. You decide you will bring order. You set up unit testing, you configure continuous integration, you measure code coverage. You write dozens or hundreds of tests. Every public method is touched, every branch is at least executed. The dashboard lights up green. You feel, quite frankly, on top of things.

Then one day, production breaks under your watch