Joseph Musser

Senior software engineer at @Microsoft, C# language design member, former 7-year Microsoft MVP

[Joseph Musser @jnm236]

@MattParkerDev @wieslawsoltes Love it! Tons and tons of work of course to do in the language. Is there a csharplang thread yet? Btw I'm not on Twitter often

[Joseph Musser @jnm236]

@johnzabroski Nice one 😄

[Joseph Musser @jnm236]

@Aella_Girl Interested!

[Joseph Musser @jnm236]

I'm excited to be joining Microsoft Fabric as a senior software engineer! I'm grateful for this opportunity to tackle new challenges together with an amazing team, stretching the limits of .NET build technology. I'll also continue as a member of the C# language design team.

[Joseph Musser @jnm236]

Today was my last day at Technology Solutions Associates, after nearly thirteen years total and seven years as a partner. Signing out for the last time is quite a feeling. I'm grateful for the opportunities I had with them, and ready for the next adventure in 2026. Stay tuned!

[Joseph Musser @jnm236]

I've added a 360° node viewer to my Myst IV Asset Explorer (https://t.co/UeFXYiHkRv)!

Rendering a skybox with SkiaSharp in Avalonia, from 3D projection first principles, was satisfying. Looking around at the final result with its layer transparency is surreal.

[Joseph Musser @jnm236]

I made an app to browse and extract #Myst IV game assets, and play audio assets with gapless looping using #dotnet and #AvaloniaUI: https://t.co/UeFXYiHkRv

It hits a nostalgic spot to have original game music instead of the soundtrack's remix; I grew up playing the Myst games.

[Joseph Musser @jnm236]

Registered for the 2026 #mvpsummit! Looking forward to flying out and seeing everyone!

[Heidi Priebe ⛰️☀️ @HeidiPriebe1]

I think that a fairly reliable mark of high intelligence is the capacity to recognize the signal within the noise of someone's 'wrong' take.
Pseudo-intelligence gleefully pours out the bathwater, raw intelligence finds & nurtures the baby.

[Joseph Musser @jnm236]

@controlflow On the other hand:
https://t.co/9uO0Nh5JyR

[Rob Eisenberg @EisenbergEffect]

The future of AI-assisted programming isn’t “prompt-to-app.”

That’s a short-term phase.

The real shift is much bigger:

• Humans write only specs
• AI handles all implementation
• Code becomes completely disposable

Let me explain 👇

[Joseph Musser @jnm236]

@controlflow If LLMs will continue to be more and more able to understand context as humans do, then maybe continuing to design languages for humans *is* designing for LLMs? I'm curious too.

[Joseph Musser @jnm236]

@controlflow Was it written prior to the language allowing multiple lambda parameters to be `_`?

[Joseph Musser @jnm236]

@Aella_Girl is refreshing. She writes from an unusual place: a deep acceptance of herself and what the world is, and the freedom and playfulness which this entails. She "gets it" on a rare level. Her writing provides that same opportunity for open minds. A very cool human.

[Joseph Musser @jnm236]

I'm losing the feeling of "what's happening is bad" that used to pop up for me when facing difficulties. Difficulties are the pathway to heart and soul and life and flow.

[Joseph Musser @jnm236]

Discussion for a proposal I'm working on: Target-typed static member lookup
https://t.co/JHzw8ohUxr

[Joseph Musser @jnm236]

@RickStrahl I'm pretty sure it's the second problem: you have two IRawString interfaces. One is unused at the moment, but it's probably getting used in the screenshot that you shared. It's also declared outside of a namespace which is probably a mistake.
https://t.co/a336gsGBzX

[Joseph Musser @jnm236]

@RickStrahl I checked out https://t.co/jxO4gvCihX and your code sample in your screenshot does not repro the issue. I'm assuming that in the progress of work, RawString is either not implementing IRawString, or is not implementing _the same_ IRawString.

[Joseph Musser @jnm236]

@RickStrahl What type does RawString.Raw return? All interface casts are allowed even if the class doesn't implement the interface, but that squiggle under "as IRawString" looks like ReSharper's "suspicious cast" warning, when you're casting to an interface that isn't currently implemented.

[Julien Couvreur @jcouv]

We merged a C# 14 feature into VS 17.13 (preview 2): Unbound generic types in `nameof`.

For example, it allows `nameof(List<>)`.

Spec: https://t.co/G0Tx2zAm1v

[Joseph Musser @jnm236]

Have you ever run 'dotnet nuget why' and gotten a ridiculous or impossible amount of output to wade through? Would you be interested in a --depth parameter, or something similar?

https://t.co/b2WXI3recO