Klaus Loeffelmann
Senior Software Engineer at Microsoft
Redmond, Washington, United States
Summary
🤩
Rockstar🎓
Top SchoolKlaus Loeffelmann is a Senior Software Engineer at Microsoft with 11 years of professional experience and two decades of overall involvement in software, currently contributing to the .NET Runtime and Desktop ecosystem from Redmond. He focuses on Windows Forms and HighDPI compatibility, having implemented cross-version workarounds and ported designer-supporting components like ArrayEditor to .NET Core, demonstrating a pragmatic full-stack approach to legacy-modern interoperability. A longtime community contributor and former multiple-year Microsoft MVP (including Developer MVP of the Year), Klaus blends deep platform expertise with hands-on bug fixing and test-driven enhancements. He also runs his own company, ActiveDevelop, reflecting enduring entrepreneurial roots alongside his enterprise engineering role. Notably, he brings a habit of subtle but impactful improvements—code formatting, tests, and edge-case fixes—that increase reliability across widely used desktop UI frameworks.
11 years of coding experience
2 years of employment as a software developer
Gymnasium Schloß Overhagen
English
Stackoverflow
36reputation
485reached
1answer
0questions
Github Skills (9)
windows-forms10
debug10
winforms10
csharp10
dotnet-core10
dotnet9
net9
unit-testing9
asp-net9
Programming languages (6)
Github contributions (5)
dotnet/winforms
Dec 2018 - Aug 2022
Windows Forms is a .NET UI framework for building Windows desktop applications.
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:354 reviews, 79 commits, 111 PRs in 3 years 8 months
Contributions summary:Klaus primarily focused on bug fixes related to HighDpi mode on Windows Forms applications. They addressed issues with setting HighDpiMode on older Windows versions (8.1 and 7) and implemented workarounds for RS1 (1607). Furthermore, they ported and added tests for the ArrayEditor from the classic framework to the core, enabling runtime designer functionality for the Chart control. They also made various code formatting improvements.
dotnetuwpwindows-desktopwindowsui-framework
KlausLoeffelmann/WinFormsCommandBinding
May 2021 - Nov 2022
Contributions:1 review, 28 commits, 40 pushes in 1 year 6 months
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