@andrewlocknet

Microsoft MVP and blogger, focused on ASP.​NET Core. Author of ASP.​NET Core in Action: https://xitter.cf/t.co/GTRJ4hBm9s @andrewlock@hachyderm.io @andrewlock.bsky.social

 Plymouth, England
andrewlock.net
Joined May 2016
  • Tweets5.9K
  • Following907
  • Followers16.8K
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Blogged: An introduction to Compact Binary Object Notation (CBOR) in .NET andrewlock.net/an-introducti… In this post I introduce CBOR as a JSON alternative, and show how to use the System.Formats.Cbor NuGet package to read and write CBOR encoded data #dotnet #aspnetcore

An introduction to Compact Binary Object Notation (CBOR) in .NET

In this post I introduce CBOR as a JSON alternative, and show how to use the System.Formats.Cbor NuGet package to read and write CBOR encoded data

andrewlock.net
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Richard Campbell
@richcampbellOct 13
Stripping Extra Dependencies in .NET NativeAOT Apps using Linker Substitutions - andrewlock.net/stripping-ext… @andrewlocknet

Stripping extra dependencies in .NET NativeAOT apps using linker substitutions

In this post I describe how to perform method-substitutions with the NativeAOT linker to remove additional dependencies that the linker couldn't see were unused

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Oleg Karasik@OlegKarasik1Oct 2
Just published a new issues of .NET R&D Digest! Thanks to @zodiacon, @lemire, @maartenballiauw, @andrewlocknet, @chnasarre, @AntonMartyniuk, @meziantou, @konradkokosa and other great authors for their amazing content! olegkarasik.wordpress.com/20… #dotnet

.NET R&D Digest (September, 2026)

This issue includes bits of life stories, concurrency, C/С++, security, AI, development tools, relational databases, SQL, XML, XPath, C#, fruit fly, Windows and of course .NET and .NET Internals.

olegkarasik.wordpress.com
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Stripping extra dependencies in .NET NativeAOT apps using linker substitutions andrewlock.net/stripping-ext… In this post I describe how to perform method substitutions with the NativeAOT linker to remove additional dependencies that the linker couldn't see were unused #dotnet

Stripping extra dependencies in .NET NativeAOT apps using linker substitutions

In this post I describe how to perform method-substitutions with the NativeAOT linker to remove additional dependencies that the linker couldn't see were unused

andrewlock.net
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Andrew Lock "Sock" retweeted
ASP.NET Core News@aspnetcore_newsSep 25
Experimental support for Device Bound Session Credentials (DBSC) in ASP .NET Core: Exploring the .NET 11 preview - Part 8 by @andrewlocknet andrewlock.net/exploring-the… #aspnetcore
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Blogged: Experimental support for Device Bound Session Credentials (DBSC) in ASP.NET Core - Exploring the .NET 11 previews andrewlock.net/exploring-the… In this post I look at the new experimental support for DBSC coming in .NET 11 #dotnet #security #aspnetcore

ASP.NET Core, an open-source web development framework | .NET

Build web apps and services that run on Windows, Linux, and macOS using C#, HTML, CSS, and JavaScript. Get started for free on Windows, Linux, or macOS.

dotnet.microsoft.com
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Understanding Device Bound Session Credentials (DBSC) andrewlock.net/understanding… In this post I provide an introduction to Device Bound Session Credentials, I look at how DBSC protects against session hijacking, and how the protocol works. #security #dotnet

Understanding Device Bound Session Credentials (DBSC)

In this post I provide an introduction to Device Bound Session Credentials, I look at how DBSC protects against session hijacking, and how the protocol works

andrewlock.net
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Andrew Lock "Sock" retweeted
Richard Campbell
@richcampbellSep 8
The Pain of Serializing Unions and Closed Class Hierarchies with System.Text.Json - andrewlock.net/exploring-the… @andrewlocknet

The pain of serializing unions and closed class hierarchies with System.Text.Json: Exploring the...

In this post I discuss the System.Text.Json support for unions and closed hierarchies coming in .NET 11, the decisions made, and some of the sharp edges I hit

andrewlock.net
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Andrew Lock "Sock" retweeted
Oleg Karasik@OlegKarasik1Sep 4
A new issue of .NET R&D Digest is here! Thanks to @rfleury, @andrewlocknet, @konradkokosa, @AntonMartyniuk, @lemire, @meziantou, @maartenballiauw and other great authors for their amazing content! olegkarasik.wordpress.com/20… #dotnet

.NET R&D Digest (August, 2026)

This issue includes bits of life story, AI, C#, security, performance, Aspire, TDD, .NET and of course .NET Internals.

olegkarasik.wordpress.com
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Blogged: The pain of serializing unions and closed class hierarchies with System.Text.Json in .NET 11 andrewlock.net/exploring-the… In this post I discuss the Json support for unions and closed hierarchies coming in .NET 11, the decisions made, and some of the sharp edges #dotnet

The pain of serializing unions and closed class hierarchies with System.Text.Json: Exploring the...

In this post I discuss the System.Text.Json support for unions and closed hierarchies coming in .NET 11, the decisions made, and some of the sharp edges I hit

andrewlock.net
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Blogged: Finding the total number of processors on a machine with .NET andrewlock.net/finding-the-t… In this post I show how to find the total number of logical CPUs on a host (not just those available to a process); something that isn't exposed in modern .NET #dotnet

Finding the total number of processors on a machine with .NET

In this post I show how to find the total number of logical CPUs on a host (not just those available to a process); something that isn't exposed in modern .NET

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3 days and @nuget still hasn't validated 4 of our packages, or responded to a customer support request... Is there anyone left there? Should someone go check on them? Or is this the brave new AI future? 🤷‍♂️
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Richard Campbell
@richcampbellAug 11
Automatic CSRF Protection Based on Fetch Metadata Headers - andrewlock.net/exploring-the… @andrewlocknet

Automatic CSRF protection based on Fetch Metadata headers: Exploring the .NET 11 preview - Part 6

In this post I describe the new Cross-Site Request Forgery protection added to ASP.NET Core that uses Fetch Metadata HTTP headers instead of antiforgery tokens

andrewlock.net
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Progress Telerik
@TelerikAug 6
Ever noticed headers like Sec-Fetch-Site and wondered what they're actually for? 👀 @andrewlocknet breaks down the Fetch Metadata headers, when browsers send them, & why devs should care. Have a look. 👇 prgress.co/4yTKOcl
Screengrab: Understanding the Fetch Metadata HTTP headers: Sec-Fetch-Site and friends

ALT Screengrab: Understanding the Fetch Metadata HTTP headers: Sec-Fetch-Site and friends

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ASP.NET Core News@aspnetcore_newsAug 7
This week's ASP .NET Core newsletter is out! This week by @raalhul, @sebnilsson, @yogihosting, @andrewlocknet, and more ❤️ Check out 'Past newsletters' here: aspnetcore.news/

ASP.NET Core News - Your weekly update of everything ASP.NET Core

ASP.NET Core News is the only weekly newsletter dedicated to ASP.NET Core. Whether you build Razor Pages, MVC applications, Web APIs, Blazor, SignalR awesomeness, or anything else available on the...

aspnetcore.news
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ASP.NET Core News@aspnetcore_newsAug 10
Automatic CSRF protection based on Fetch Metadata headers: Exploring the .NET 11 preview - Part 6 by @andrewlocknet andrewlock.net/exploring-the… #aspnetcore
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Andrew Lock "Sock" retweeted
Peter Morris
@MrPeterLMorrisAug 10
I would really appreciate a retweet! My current contract will be coming to an end in a month or two. I'm therefore starting to look around for my next opportunity, whether that's remote contract work or a permanent role. I'm the author of Blazor-University.com, Fluxor, Roslynk, and some other things. linkedin.com/in/peter-morris… github.com/mrpmorris/
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ASP.NET Core News@aspnetcore_newsAug 4
Understanding the Fetch Metadata HTTP headers: Sec-Fetch-Site and friends by @andrewlocknet andrewlock.net/understanding… #aspnetcore
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Andrew Lock "Sock" retweeted
Richard Campbell
@richcampbellAug 3
Understanding the Fetch Metadata HTTP Headers - andrewlock.net/understanding… @andrewlocknet

Understanding the Fetch Metadata HTTP headers: Sec-Fetch-Site and friends

In this post I describe the Fetch Metadata HTTP headers like Sec-Fetch-Site and Sec-Fetch-Mode which give information to a server about the context of a request

andrewlock.net
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Blogged: Automatic CSRF protection based on Fetch Metadata headers - Exploring the .NET 11 preview andrewlock.net/exploring-the… In this post I describe the new Cross-Site Request Forgery protection added to aspnetcore that relies on HTTP headers, not tokens #aspnetcore #security

Automatic CSRF protection based on Fetch Metadata headers: Exploring the .NET 11 preview - Part 6

In this post I describe the new Cross-Site Request Forgery protection added to ASP.NET Core that uses Fetch Metadata HTTP headers instead of antiforgery tokens

andrewlock.net
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