I am a developer and erstwhile architect with extensive experience designing testable windows forms applications. In recent years, I have spent much time evolving a innocuous (or "minimalist") architectural approach to code design for windows forms applications (notice I didn't say framework).
The erstwhile when referring to architecture comes from the fact that I used to be an application architect in title. I now preach anti-architecture as a means of improving architectural quality. This is similar to the approach of understanding anti-patterns to improve pattern usage.