I really enjoyed chatting with Jamie about Minimal APIs, OpenAPI, and MCP!

Yes, definitely check this one out. Safia shares her drive for open source and .NET and it is truly inspiring.

If anyone knows how to automatically close the terminal instance that runs the "postCreateCommand" in a #devcontainer opened in #vscode, please let me know! I am constantly rebuilding my devcontainer to get to a clean state, and having to close that window every time is annoying!

MCP Dev Days | Microsoft Reactor Attend Reactor Event Series for on-going opportunities to learn, connect, and build. Expand your skillset.

I'll be presenting at #MCPDevDays tomorrow on the MCP C# SDK. Come watch all the great talks today and tomorrow!

aka.ms/mcpdevdays

#csharp #dotnet

MCP C# SDK Gets Major Update: Support for Protocol Version 2025-06-18 - .NET Blog The MCP C# SDK has been updated to support the latest Model Context Protocol specification (2025-06-18), bringing structured tool output, elicitation support, enhanced security, and more to .NET devel...

Hey folks, if you are working with Model Context Protocol in C#, you should check out the features in our latest SDK release. I wrote about them in the .NET Blog. Check it out!
devblogs.microsoft.com/dotnet/mcp-c...
#dotnet

Folks, we had to move this one hour earlier today, so we'll be starting at 9AM PT. Hope you can make it!

.NET 10 Preview 5 is now available! - .NET Blog Find out about the new features in .NET 10 Preview 5 across the .NET runtime, SDK, libraries, https://msft.it/63327SqtVX Core, Blazor, C#, .NET MAUI, and more!

.NET 10 Preview 5 is out! Key enhancements include:
🛡️ Post-quantum cryptography
📜 OpenAPI 3.1
💻 C# 14 operators
📈 Blazor metrics & tracing
🌐 .NET MAUI XAML namespaces
...and more.
Explore it now! 🔗 https://msft.it/63322SqtVj
#dotNET10 #dotNETMAUI #CSharp

GitHub - microsoft/Build25-BRK122 Contribute to microsoft/Build25-BRK122 development by creating an account on GitHub.

I presented with @danroth27.bsky.social yesterday at Build on the future of ASP.NET Core and Blazor. We got all our content in with plenty of time to spare -- at least 30-40 seconds ;-). Check it out!
github.com/microsoft/Bu...
#dotnet

.NET 10 Preview 4 is now available! - .NET Blog Find out about the new features in .NET 10 Preview 4 across the .NET runtime, SDK, libraries, ASP.NET Core, Blazor, C#, .NET MAUI, and more!

🚀 .NET 10 Preview 4 is here!

✨ Tons of Blazor & OpenAPI improvements
📱 Android app size reduction
🤖 AI data upgrades for EF Core
⚡ Inlining improvements
📦 New async ZIP APIs & so much more!

Learn more: devblogs.microsoft.com/dotnet/dotne...

#dotnet

I was on Jesse Liberty's podcast earlier this week. We chatted about OpenAPI, including how it isn't "Swagger" anymore (sorry -- pet peeve), and how ASP.NET makes it easier than ever to generate great OpenAPI documents for your apps. Check it out!
jesseliberty.com/2025/05/14/m...
#dotnet #openapi

Building Real‑Time iOS Apps with SignalR: Introducing the Official Swift Client (Public Preview) - .NET Blog Introduction Until now, iOS developers who wanted real‑time, bi‑directional communication with SignalR had to rely on community‑built clients or roll their own Swift implementation—both of which intro...

Check out Kevin Guo's new blog post on the Official Swift client for SignalR -- now available in preview!
devblogs.microsoft.com/dotnet/build...

Microsoft partners with Anthropic to create official C# SDK for Model Context Protocol Microsoft is collaborating with Anthropic to create an official C# SDK for the Model Context Protocol (MCP). MCP has seen rapid adoption in the AI community, and this partnership aims to enhance the i...

Want to use C# to build an MCP server or an AI application that connects to MCP servers? Then you should check out the new MCP C# SDK. Read all about it in my new blog post:
devblogs.microsoft.com/blog/microso...

#dotnet #mcp

Exploring new .NET releases with Dev Containers - .NET Blog Learn how to set up and use dev containers for experimenting with new .NET releases.

Check out my new post in the .NET Blog on running new releases of .NET with dev containers in VS Code:
devblogs.microsoft.com/dotnet/dotne...

Safia is doing awesome things!

ASP.NET Core Roadmap for .NET 10 · Issue #59443 · dotnet/aspnetcore This issue represents the list of major investments our team will focus on during the .NET 10 timeframe. It doesn't include all the features and bug fixes we'll be tackling during this time. Note t...

🗺️We just updated our ASP.NET Core roadmap for .NET 10: aka.ms/aspnet/roadmap

Take a look and give us your input!

I guess this was my own fault. I had an alias for "python" to "/opt/homebrew/bin/python3", so the virtual environment could not override that. But this worked fine with earlier versions of Python ...

Python is completely broken for me. I can't install packages, even when I have (reluctantly) created a virtual environment. pip install fails with "error: externally-managed-environment". So frustrating.

Science says that the entropy of the universe is monotonically increasing. I find this troubling because I feel like I spend all my time attempting to decrease entropy.

I spent a few hours building a AppleScript to open or create a new Apple note, optionally in a specified, possibly nested folder, possibly with a body passed as a file. Posting here in case anyone else finds this useful.

github.com/mikekistler/...

#macos

OpenAPI document generation in .NET 9 - .NET Blog Introducing the New OpenAPI Document Generation Feature in .NET 9. Let's take a look at what it is, how to use it, and how it streamlines API development in .NET.

Hi folks! Please check out my new post in the .NET blog on the .NET 9 support for generating OpenAPI documents for ASP.NET Core web applications.

devblogs.microsoft.com/dotnet/dotne...

And there's lots more information on this in the docs on MS Learn:

learn.microsoft.com/en-us/aspnet...

Support XML-based OpenAPI docs for minimal and controller-based APIs with `Microsoft.AspNetCore.OpenApi` · Issue #39927 · dotnet/aspnetcore This issue tracks adding support for enhancing OpenAPI documents generated via the Microsoft.AspNetCore.OpenApi package with XML comments present in both minimal and controller-based APIs and their...

Finally posted an update about _experimental_ support for XML-based docs in OpenAPI documents generated from ASP.NET Core APIs.

I'm kinda excited about this idea about shipping and iterating on features through experimental packages before bringing stuff to primetime.

github.com/dotnet/aspne...

As you can see from my recent tweets, my headspace is already in .NET 10 land. 🤪

But I just finished co-presenting the OpenAPI session at #dotnetconf and it always feels good to pause and reflect on the progress that's been made.

😀