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Work flow of diagnosing memory performance issues – Part 1
maoniApril 12, 2020Apr 12, 202004/12/20

Work flow of diagnosing memory performance issues – Part 0
In this blog post I’ll talk a bit about contributing to PerfView and then continue with the GCStats analysis. You can skip to the analysis part directly if you like.
One of the frustrating things for me when it comes to tooling is there are a lot of memory perf tools out there but very few are targeting the common types of customers I normally work with.

Work flow of diagnosing memory performance issues – Part 0
maoniApril 5, 2020Apr 5, 202004/5/20

I wanted to describe what I do to diagnose memory perf issues, or rather the common part of various work flows of doing such diagnostics. Diagnosing performance issues can take many forms because there’s no fixed steps you follow. But I’ll try to break it down into basic blocks that get invoked for a variety of diagnostics.

Regex Performance Improvements in .NET 5
AvatarApril 2, 2020Apr 2, 202004/2/20

For .NET 5, we’ve invested in some significant improvements to the Regex engine. On many of the expressions we’ve tried, these changes routinely result in throughput improvements of 3-6x, and in some cases, much more. In this post, I’ll walk through some of the myriad of changes that have gone into System.Text.RegularExpressions in .NET 5.

Image ef5preview2
Announcing Entity Framework Core 5.0 Preview 2
Jeremy LiknessApril 2, 2020Apr 2, 202004/2/20

Today we are excited to announce the second preview release of EF Core 5.0. Improvements include support for C# attributes to specify a backing field, complete discriminator mapping, and performance improvements with SQLite.

Announcing .NET 5.0 Preview 2
AvatarApril 2, 2020Apr 2, 202004/2/20

Today, we’re releasing .NET 5.0 Preview 2. It contains a set of smaller features and performance improvements. We’re continuing to work on the bigger features that will define the 5.0 release, some of which are starting to show up as initial designs at dotnet/designs.

.NET for Apache® Spark™ In-Memory DataFrame Support
Brigit MurtaughMarch 30, 2020Mar 30, 202003/30/20

.NET for Apache Spark is aimed at making Apache® Spark™, and thus the exciting world of big data analytics, accessible to .NET developers. .NET for Spark can be used for processing batches of data, real-time streams, machine learning, and ad-hoc query.

Helping Customers Effectively
maoniMarch 30, 2020Mar 30, 202003/30/20

I have to put a disclaimer here since this is not the usual type of blog posts I write. I’m by no means a master at communication. This is just what I thought that seemed to work well. YMMV of course.

Balancing work on GC threads
maoniMarch 28, 2020Mar 28, 202003/28/20

In Server GC, each GC thread will work on its heap in parallel (that’s a simplistic view and is not necessarily true for all phases but on the high level it’s exact the idea of a parallel GC). So that alone means work is already split between GC threads.

.NET Core March 2020 Updates – 2.1.17 and 3.1.3
Rahul Bhandari (MSFT)March 24, 2020Mar 24, 202003/24/20

Today, we are releasing the .NET Core March 2020 Update. These updates only contain non-security fixes. See the individual release notes for details on updated packages.
NOTE: If you are a Visual Studio user, there are MSBuild version requirements so use only the .NET Core SDK supported for each Visual Studio version.

Catch up on the latest .NET Productivity features
Mika DumontMarch 24, 2020Mar 24, 202003/24/20

The Roslyn team continuously works to provide tooling that deeply understands the code you are writing in-order to help you be more productive. In this post, I’ll cover some of the latest .NET Productivity features available in Visual Studio 2019.

Tooling improvements
The feature that I’m most excited about is the new Go To Base command.

AI Machine Learning

February ML.NET Model Builder Updates
Bri AchtmanMarch 2, 2020Mar 2, 202003/2/20

With the ML.NET Model Builder, create custom machine learning models for scenarios like sentiment analysis, price prediction, and more without any machine learning experience and without leaving the .NET ecosystem!

Announcing ML.NET 1.4 general availability (Machine Learning for .NET)
Cesar De la TorreNovember 6, 2019Nov 6, 201911/6/19

Coinciding with the Microsoft Ignite 2019 conference, we are thrilled to announce the GA release of ML.NET 1.4 and updates to Model Builder in Visual Studio, with exciting new machine learning features that will allow you to innovate your .NET applications.

ML.NET and Model Builder at .NET Conf 2019 (Machine Learning for .NET)
Cesar De la TorreSeptember 24, 2019Sep 24, 201909/24/19

We are excited today to announce updates to Model Builder and improvements in ML.NET. You can learn more in the “What’s new in ML.NET?.” session at .NET Conf.
ML.NET is an open-source and cross-platform machine learning framework (Windows, Linux, macOS) for .NET developers.

Hey .NET! Have you tried ML.NET?
Bri AchtmanAugust 21, 2019Aug 21, 201908/21/19

ML.NET is an open source and cross-platform machine learning framework made for .NET developers.
Using ML.NET you can easily build custom machine learning models for scenarios like sentiment analysis, price prediction, sales forecasting, recommendation, image classification, and more.
ML.NET 1.0 was released at //Build 2019,

Announcing ML.NET 1.2 and Model Builder updates (Machine Learning for .NET)
Cesar De la TorreJuly 17, 2019Jul 17, 201907/17/19

We are excited to announce ML.NET 1.2 and updates to Model Builder and the CLI. ML.NET is an open-source and cross-platform machine learning framework for .NET developers. ML.NET also includes Model Builder (a simple UI tool for Visual Studio) and the ML.NET CLI (Command-line interface) to make it super easy to build custom Machine Learning (ML) models using Automated Machine Learning (AutoML).

Submit to the Applied F# Challenge!
Phillip CarterFebruary 5, 2019Feb 5, 201902/5/19

This post was written by Lena Hall, a Senior Cloud Developer Advocate at Microsoft.
F# Software Foundation has recently announced their new initiative — Applied F# Challenge! We encourage you to participate and send your submissions about F# on Azure through the participation form.

Tell us your thoughts on ML.NET, an open source and cross-platform machine learning framework
Bri Achtman [MSFT]January 9, 2019Jan 9, 201901/9/19

ML.NET is an open source and cross-platform machine learning framework made for .NET developers. .NET developers can use their C# or F# skills to easily integrate custom machine learning into their web, mobile, desktop, gaming, or IoT applications without any prior expertise in developing or tuning machine learning models.

Announcing ML.NET 0.8 – Machine Learning for .NET
Cesar De la TorreDecember 4, 2018Dec 4, 201812/4/18

ML.NET is an open-source and cross-platform framework (Windows, Linux, macOS) which makes machine learning accessible for .NET developers.
ML.NET allows you to create and use machine learning models targeting scenarios to achieve common tasks such as sentiment analysis, issue classification, forecasting,

Announcing ML.NET 0.7 (Machine Learning .NET)
Cesar De la TorreNovember 8, 2018Nov 8, 201811/8/18

We’re excited to announce today the release of ML.NET 0.7 – the latest release of the cross-platform and open source machine learning framework for .NET developers (ML.NET 0.1 was released at //Build 2018). This release focuses on enabling better support for recommendation based ML tasks,

Using .NET Hardware Intrinsics API to accelerate machine learning scenarios
AvatarOctober 10, 2018Oct 10, 201810/10/18

This week’s blog post is by Brian Lui, one of our summer interns on the .NET team, who’s been hard at work. Over to Brian:
Hello everyone! This summer I interned in the .NET team, working on ML.NET, an open-source machine learning platform which enables .NET developers to build and use machine learning models in their .NET applications.

Apache

Using .NET for Apache® Spark™ to Analyze Log Data
Brigit MurtaughFebruary 10, 2020Feb 10, 202002/10/20

.NET for Apache Spark makes Apache® Spark™, and thus the exciting world of big data analytics, accessible to .NET developers. .NET for Spark can be used for processing batches of data, real-time streams, machine learning, and ad-hoc query. In this post, we explore how to use .NET for Spark to perform log analysis.

ASP.NET

.NET Core April 2019 Updates – 2.1.10 and 2.2.4
AvatarApril 9, 2019Apr 9, 201904/9/19

Today, we are releasing the .NET Core April 2019 Update. These updates contain security and reliability fixes. See the individual release notes for details on included fixes.

.NET Core 2.2.4 and .NET Core SDK 2.2.106 ( Download | Release Notes )
.NET Core 2.1.10 and .NET Core SDK 2.1.506 ( Download | Release Notes)

Security
Microsoft Security Advisory CVE-2019-0815: ASP.NET Core Denial of Service Vulnerability
A denial of service vulnerability exists in ASP.NET Core 2.2 where,

Collecting .NET Core Linux Container CPU Traces from a Sidecar Container
AvatarMarch 5, 2019Mar 5, 201903/5/19

It is challenging to collect performance traces of ASP.NET Core applications running inside Linux containers. This blog post describes an approach that use a sidecar container to collect CPU trace of an ASP.NET application running in a Linux container.

Calling All Desktop Developers: How do you interact with data?
AvatarFebruary 27, 2018Feb 27, 201802/27/18

Connecting to databases and services is an important part of desktop application development for many of our customers. Visual Studio provides a variety of tools and technologies that can help you connect to and interact with your different data sources. We’d love your help in shaping our future offerings in this space!

Build a web service with F# and .NET Core 2.0
Phillip CarterSeptember 26, 2017Sep 26, 201709/26/17

Earlier this year, I wrote about an update to the roadmap for F# and .NET Core. I had mentioned that there were a number of things you could build with F# and .NET Core today, such as web services. In this post,

Get Started with F# as a C# developer
Phillip CarterJuly 24, 2017Jul 24, 201707/24/17

Get Started with F# as a C# developer
One of our previous posts, Why You Should Use F#, listed a few reasons why F# is worth trying out today. In this post, we’ll cover some of the basics you need to know to be successful.

Async

Async ValueTask Pooling in .NET 5
AvatarMarch 16, 2020Mar 16, 202003/16/20

The async/await feature in C# has revolutionized how developers targeting .NET write asynchronous code. Sprinkle some async and await around, change some return types to be tasks, and badda bing badda boom, you’ve got an asynchronous implementation. In theory.
In practice,

ConfigureAwait FAQ
AvatarDecember 11, 2019Dec 11, 201912/11/19

.NET added async/await to the languages and libraries over seven years ago. In that time, it’s caught on like wildfire, not only across the .NET ecosystem, but also being replicated in a myriad of other languages and frameworks. It’s also seen a ton of improvements in .NET,

Azure

Automating Release Notes with Azure Functions
AvatarOctober 16, 2018Oct 16, 201810/16/18

We can all agree that tracking the progress of a project enhances productivity and is an effective way to keep everyone involved of its progress. When it comes to managing your project in Azure DevOps (formerly VSTS) or GitHub, you have all of your artifacts in one place: code,

C#

Image ef5preview2
Announcing Entity Framework Core 5.0 Preview 2
Jeremy LiknessApril 2, 2020Apr 2, 202004/2/20

Today we are excited to announce the second preview release of EF Core 5.0. Improvements include support for C# attributes to specify a backing field, complete discriminator mapping, and performance improvements with SQLite.

Async ValueTask Pooling in .NET 5
AvatarMarch 16, 2020Mar 16, 202003/16/20

The async/await feature in C# has revolutionized how developers targeting .NET write asynchronous code. Sprinkle some async and await around, change some return types to be tasks, and badda bing badda boom, you’ve got an asynchronous implementation. In theory.
In practice,

An Introduction to DataFrame
Prashanth GovindarajanDecember 16, 2019Dec 16, 201912/16/19

Last month, we announced .NET support for Jupyter notebooks, and showed how to use them to work with .NET for Apache Spark and ML.NET. Today, we’re announcing the preview of a DataFrame type for .NET to make data exploration easy. If you’ve used Python to manipulate data in notebooks,

ConfigureAwait FAQ
AvatarDecember 11, 2019Dec 11, 201912/11/19

.NET added async/await to the languages and libraries over seven years ago. In that time, it’s caught on like wildfire, not only across the .NET ecosystem, but also being replicated in a myriad of other languages and frameworks. It’s also seen a ton of improvements in .NET,

An Introduction to System.Threading.Channels
AvatarDecember 11, 2019Dec 11, 201912/11/19

“Producer/consumer” problems are everywhere, in all facets of our lives. A line cook at a fast food restaurant, slicing tomatoes that are handed off to another cook to assemble a burger, which is handed off to a register worker to fulfill your order,

.NET Core with Jupyter Notebooks – Available today | Preview 1
Maria NaggagaNovember 6, 2019Nov 6, 201911/6/19

You can now write .NET Code in Jupyter Notebooks. Try .NET has grown to support more interactive experiences across the web with runnable code snippets, interactive documentation generator for .NET core with dotnet try global tool, and now .NET in Jupyter Notebooks. And you can get started with it today!

Announcing ML.NET 1.4 Preview and Model Builder updates (Machine Learning for .NET)
Cesar De la TorreSeptember 3, 2019Sep 3, 201909/3/19

We are excited to announce ML.NET 1.4 Preview and updates to Model Builder and CLI.
ML.NET is an open-source and cross-platform machine learning framework for .NET developers. ML.NET also includes Model Builder (a simple UI tool) and CLI to make it super easy to build custom Machine Learning (ML) models using Automated Machine Learning (AutoML).

Create Interactive .NET Documentation with Try .NET
Maria NaggagaMay 16, 2019May 16, 201905/16/19

Try .NET is an interactive documentation generator for .NET Core. Using the dotnet try global tool you can now create interactive documentation too. This is an early preview of the dotnet try global tool so, please check our repository and NuGet package for regular updates.

Performance Improvements in .NET Core 3.0
AvatarMay 15, 2019May 15, 201905/15/19

Take a tour through some of the many improvements, big and small, that have gone into the .NET Core 3.0 runtime and core libraries to make apps and services leaner and faster.

Default implementations in interfaces
Mads TorgersenMay 14, 2019May 14, 201905/14/19

Default implementations in interfaces
With last week’s posts Announcing .NET Core 3.0 Preview 5 and Visual Studio 2019 version 16.1 Preview 3, the last major feature of C# 8.0 is now available in preview.
A big impediment to software evolution has been the fact that you couldn’t add new members to a public interface.

Concurrency

Async ValueTask Pooling in .NET 5
AvatarMarch 16, 2020Mar 16, 202003/16/20

The async/await feature in C# has revolutionized how developers targeting .NET write asynchronous code. Sprinkle some async and await around, change some return types to be tasks, and badda bing badda boom, you’ve got an asynchronous implementation. In theory.
In practice,

ConfigureAwait FAQ
AvatarDecember 11, 2019Dec 11, 201912/11/19

.NET added async/await to the languages and libraries over seven years ago. In that time, it’s caught on like wildfire, not only across the .NET ecosystem, but also being replicated in a myriad of other languages and frameworks. It’s also seen a ton of improvements in .NET,

An Introduction to System.Threading.Channels
AvatarDecember 11, 2019Dec 11, 201912/11/19

“Producer/consumer” problems are everywhere, in all facets of our lives. A line cook at a fast food restaurant, slicing tomatoes that are handed off to another cook to assemble a burger, which is handed off to a register worker to fulfill your order,

Docker

We made Windows Server Core container images >40% smaller
AvatarDecember 9, 2019Dec 9, 201912/9/19

Over the past year, we’ve been working with the Windows Server team to make Windows Server Core container images a lot smaller. They are now 40% smaller! The Windows Server team has already published the new images in the Server Core Insider Docker repo,

Announcing .NET Core 3.0 Preview 5
AvatarMay 6, 2019May 6, 201905/6/19

Today, we are announcing .NET Core 3.0 Preview 5. It includes a new Json serializer, support for publishing single file executables, an update to runtime roll-forward, and changes in the BCL. If you missed it, check out the improvements we released in .NET Core 3.0 Preview 4,

Using .NET and Docker Together – DockerCon 2019 Update
AvatarApril 29, 2019Apr 29, 201904/29/19

DockerCon 2019 is being held this week, in San Francisco. We posted a DockerCon 2018 update last year, and it is time to share how we’ve improved the experience of using .NET and Docker together over the last year.
We have a group of .NET Core team members attending the conference again this year.

Dot.Net

GC Perf Infrastructure – Part 1
maoniDecember 9, 2019Dec 9, 201912/9/19

We open sourced our new GC Perf Infrastructure! It’s now part of the dotnet performance repo. I’ve been meaning to write about it ‘cause some curious minds had been asking when they could use it after I blogged about it last time but didn’t get around to it till now.

Announcing .NET Core 3.0 Release Candidate 1
AvatarSeptember 16, 2019Sep 16, 201909/16/19

Today, we’re announcing .NET Core 3.0 Release Candidate 1. Just like with Preview 9, we’ve focused on polishing .NET Core 3.0 for a final release. We are now getting very, very close. We intend to release the final version on September 23 at .NET Conf.

Finalization implementation details
maoniSeptember 16, 2019Sep 16, 201909/16/19

Years ago I wrote a document on making finalization scanning concurrent. At the time there was an internal team that was using finalization as a way to resurrect objects and putting them back in their cache. While we’ve always advised to folks that finalization was for releasing native resources I couldn’t fault this team for using it the way they did.

.NET Core September 2019 Updates – 2.1.13 and 2.2.7
Lee CowardSeptember 10, 2019Sep 10, 201909/10/19

Today, we are releasing the .NET Core September 2019 Update. These updates contain security and reliability fixes. See the individual release notes for details on updated packages.
NOTE: If you are a Visual Studio user, there are MSBuild version requirements so use only the .NET Core SDK supported for each Visual Studio version.

Announcing .NET Core 3.0 Preview 9
AvatarSeptember 4, 2019Sep 4, 201909/4/19

Today, we’re announcing .NET Core 3.0 Preview 9. Just like with Preview 8, we’ve focused on polishing .NET Core 3.0 for a final release and aren’t adding new features. If these final builds seem less exciting than earlier previews, that’s by design.

Join us for .NET Conf 2019, Sept 23-25
AvatarSeptember 3, 2019Sep 3, 201909/3/19

.NET Conf is back again this year and will be live streaming to a device near you September 23-25 on www.dotnetconf.net! .NET Conf is a FREE, 3 day virtual developer event co-organized by the .NET community and Microsoft. This year .NET Core 3.0 will launch at .NET Conf 2019!

How the .NET Team uses Azure Pipelines to produce Docker Images
AvatarAugust 28, 2019Aug 28, 201908/28/19

Producing Docker images for .NET might not seem like that big of a deal.  Once you’ve got a Dockerfile defined, just run “docker build“ and “docker push“ and you’re done, right?  Then just rinse and repeat when new versions of .NET are released and that should be all that’s needed. 

Visual Studio Tips and Tricks: Increasing your Productivity for .NET
Mika DumontAugust 22, 2019Aug 22, 201908/22/19

The .NET team is constantly thinking of new ways to make developers more productive. We’ve been working hard over the past year to take the feedback you’ve sent us and turn it into tools that you want! In this post I’ll cover some of the latest productivity features available in Visual Studio 2019 Preview.

.NET Framework 4.8 is available on Windows Update, WSUS and MU Catalog
Namrata KarnamAugust 13, 2019Aug 13, 201908/13/19

01/14/2020: This post has been updated with information about the Microsoft .NET Framework 4.8 for Windows Updates released on January 14, 2020 via Windows Update/WSUS/Catalog to include the servicing fixes since the .NET Framework 4.8 August 2019 Windows Update. Apart from the servicing fixes,

Announcing .NET Core 3.0 Preview 8
AvatarAugust 13, 2019Aug 13, 201908/13/19

Today, we are announcing .NET Core 3.0 Preview 8. Just like with Preview 7, we’ve focused on polishing .NET Core 3.0 for a final release and are not adding new features. If these final previews seem anti-climatic, that’s by design.
Download .NET Core 3.0 Preview 8 right now on Windows,

Entity Framework

Image ef5preview2
Announcing Entity Framework Core 5.0 Preview 2
Jeremy LiknessApril 2, 2020Apr 2, 202004/2/20

Today we are excited to announce the second preview release of EF Core 5.0. Improvements include support for C# attributes to specify a backing field, complete discriminator mapping, and performance improvements with SQLite.

Announcing Entity Framework Core 5.0 Preview 1
AvatarMarch 16, 2020Mar 16, 202003/16/20

Today we are excited to announce the first preview release of EF Core 5.0.
Prerequisites
The previews of EF Core 5.0 require .NET Standard 2.1. This means:

EF Core 5.0 runs on .NET Core 3.1; it does not require .NET 5.

Announcing Entity Framework Core 3.1 and Entity Framework 6.4
AvatarDecember 3, 2019Dec 3, 201912/3/19

Announcing Entity Framework Core 3.1 and Entity Framework 6.4
We are excited to announce the general availability of EF Core 3.1 and EF 6.4 on nuget.org.
The final versions of .NET Core 3.1 and ASP.NET Core 3.1 are also available now.

Announcing Entity Framework Core 3.0 and Entity Framework 6.3 General Availability
AvatarSeptember 23, 2019Sep 23, 201909/23/19

We are extremely excited to announce the general availability of EF Core 3.0and EF 6.3 on nuget.org.
The final versions of .NET Core 3.0 and ASP.NET Core 3.0 are also available now.
How to get EF Core 3.0
EF Core 3.0 is distributed exclusively as a set of NuGet packages.

Release Candidate builds of Entity Framework Core 3.0 and Entity Framework 6.3 are now available
AvatarSeptember 16, 2019Sep 16, 201909/16/19

We previously said that preview 9 would be your last chance to test EF Core 3.0 and EF 6.3 before general availability. But it turns out that we made enough improvements to our libraries and across the whole of .NET Core 3.0 to justify publishing a release candidate build.

Announcing Entity Framework Core 3.0 Preview 9 and Entity Framework 6.3 Preview 9
AvatarSeptember 4, 2019Sep 4, 201909/4/19

Preview 9 your last chance to try Entity Framework Core 3.0 and Entity Framework 6.3 before we release the final versions later this month. Get a head start on everything that is new and please give us your feedback.

Announcing Entity Framework Core 3.0 Preview 8 and Entity Framework 6.3 Preview 8
AvatarAugust 13, 2019Aug 13, 201908/13/19

The Preview 8 versions of the EF Core 3.0 package and the EF 6.3 package are now available for download from nuget.org.
New previews of .NET Core 3.0 and ASP.NET Core 3.0 are also available today.
Please install these previews to validate that all the functionality required by your applications is available and works correctly. 

Announcing Entity Framework Core 3.0 Preview 6 and Entity Framework 6.3 Preview 6
AvatarJune 13, 2019Jun 13, 201906/13/19

New previews of the next versions of EF Core and EF 6 are now available on NuGet.Org.
What is new in EF Core 3.0 Preview 6
In recent months, a lot of our efforts have been focused on a new LINQ implementation for EF Core 3.0.

Announcing Entity Framework 6.3 Preview with .NET Core Support
AvatarMay 8, 2019May 8, 201905/8/19

The first preview of the EF 6.3 runtime is now available in NuGet.
Note that the package is versioned as 6.3.0-preview5. We plan to continue releasing previews of EF 6.3 every month in alignment with the .NET Core 3.0 previews, until we ship the final version.

Announcing Entity Framework Core 3.0 Preview 4
AvatarApril 18, 2019Apr 18, 201904/18/19

Today, we are making the fourth preview of Entity Framework Core 3.0 available on NuGet, alongside .NET Core 3.0 Preview 4 and ASP.NET Core 3.0 Preview 4. We encourage you to install this preview to test the new functionality and assess the impact of the included breaking changes.

F#

An Introduction to DataFrame
Prashanth GovindarajanDecember 16, 2019Dec 16, 201912/16/19

Last month, we announced .NET support for Jupyter notebooks, and showed how to use them to work with .NET for Apache Spark and ML.NET. Today, we’re announcing the preview of a DataFrame type for .NET to make data exploration easy. If you’ve used Python to manipulate data in notebooks,

.NET Core with Jupyter Notebooks – Available today | Preview 1
Maria NaggagaNovember 6, 2019Nov 6, 201911/6/19

You can now write .NET Code in Jupyter Notebooks. Try .NET has grown to support more interactive experiences across the web with runnable code snippets, interactive documentation generator for .NET core with dotnet try global tool, and now .NET in Jupyter Notebooks. And you can get started with it today!

The F# development home on GitHub is now dotnet/fsharp
Phillip CarterMay 20, 2019May 20, 201905/20/19

TL;DR We’ve moved the F# GitHub repository from microsoft/visualfsharp to dotnet/fsharp, as specified in the corresponding RFC.

F# has a somewhat strange history in its name and brand. If we roll back the clocks to the year 2015, F# sort of had two identities.

Announcing F# 4.6
Phillip CarterMarch 29, 2019Mar 29, 201903/29/19

We’re excited to announce general availability of F# 4.6 and the F# tools for Visual Studio 2019! In this post, I’ll show you how to get started, explain the F# 4.6 feature set, give you an update on the F# tools for Visual Studio,

Submit to the Applied F# Challenge!
Phillip CarterFebruary 5, 2019Feb 5, 201902/5/19

This post was written by Lena Hall, a Senior Cloud Developer Advocate at Microsoft.
F# Software Foundation has recently announced their new initiative — Applied F# Challenge! We encourage you to participate and send your submissions about F# on Azure through the participation form.

Announcing F# 4.6 Preview
Phillip CarterJanuary 24, 2019Jan 24, 201901/24/19

F# 4.6 is now fully released. See the announcement blog post for more.
We’re excited to announce that Visual Studio 2019 will ship a new version of F# when it releases: F# 4.6!
F# 4.6 is a smaller update to the F# language,

Announcing F# 4.5
Phillip CarterAugust 14, 2018Aug 14, 201808/14/18

Today, we’re incredibly pleased to announce general availability of F# 4.5.
This post will walk through the changes in F# 4.5 (just like the preview post), then show some updates to F# tooling, and finally talk a bit about where what we’re thinking about for the next F# version.

Announcing F# 4.5 Preview
Phillip CarterJuly 26, 2018Jul 26, 201807/26/18

Accounting for this change on Windows build servers: You may be doing one of the following things to install F# on a Windows build server. Installing the full Visual Studio IDE Installing the F# Compiler SDK MSI Neither of these options have been recommended for some time, but are still available with F# 4.1.

F# language and tools update for Visual Studio 2017 version 15.7
Phillip CarterMay 8, 2018May 8, 201805/8/18

We’re excited to share updates about changes to F# and F# tools which shipped with the Visual Studio 2017 version 15.7 release. Let’s dive in!
Type Providers now support .NET Standard
For those who aren’t familiar with Type Providers, they are a feature of F# which allow you to get IntelliSense for data.

F# language and tools update for Visual Studio 2017 version 15.6
Phillip CarterMarch 6, 2018Mar 6, 201803/6/18

With the release of Visual Studio 2017 version 15.6, we’re excited to share updates to the F# language and core library, F# tooling in Visual Studio, and infrastructure updates that concern OSS contributors. Let’s dive in!
F# language and core library updates
Some foundational changes for the F# language and core library have been made,

GC

GC Perf Infrastructure – Part 0
maoniSeptember 9, 2019Sep 9, 201909/9/19

In this blog entry and some future ones I will be showing off functionalities that our new GC perf infrastructure provides. Andy and I have been working on it (he did all the work; I merely played the consultant role). We will be open sourcing it soon and I wanted to give you some examples of using it and you can add these to your repertoire of perf analysis techniques when it’s available.

LOH

Large Object Heap Uncovered (an old MSDN article)
maoniMay 31, 2016May 31, 201605/31/16

I wrote this article in 2008 and the MSDN website no longer has it so I am making it available here. Please note that it has been quite a while and some things related to LOH have changed quite a bit.

Machine Learning

February ML.NET Model Builder Updates
Bri AchtmanMarch 2, 2020Mar 2, 202003/2/20

With the ML.NET Model Builder, create custom machine learning models for scenarios like sentiment analysis, price prediction, and more without any machine learning experience and without leaving the .NET ecosystem!

An Introduction to DataFrame
Prashanth GovindarajanDecember 16, 2019Dec 16, 201912/16/19

Last month, we announced .NET support for Jupyter notebooks, and showed how to use them to work with .NET for Apache Spark and ML.NET. Today, we’re announcing the preview of a DataFrame type for .NET to make data exploration easy. If you’ve used Python to manipulate data in notebooks,

Announcing ML.NET 1.4 general availability (Machine Learning for .NET)
Cesar De la TorreNovember 6, 2019Nov 6, 201911/6/19

Coinciding with the Microsoft Ignite 2019 conference, we are thrilled to announce the GA release of ML.NET 1.4 and updates to Model Builder in Visual Studio, with exciting new machine learning features that will allow you to innovate your .NET applications.

ML.NET and Model Builder at .NET Conf 2019 (Machine Learning for .NET)
Cesar De la TorreSeptember 24, 2019Sep 24, 201909/24/19

We are excited today to announce updates to Model Builder and improvements in ML.NET. You can learn more in the “What’s new in ML.NET?.” session at .NET Conf.
ML.NET is an open-source and cross-platform machine learning framework (Windows, Linux, macOS) for .NET developers.

Announcing ML.NET 1.4 Preview and Model Builder updates (Machine Learning for .NET)
Cesar De la TorreSeptember 3, 2019Sep 3, 201909/3/19

We are excited to announce ML.NET 1.4 Preview and updates to Model Builder and CLI.
ML.NET is an open-source and cross-platform machine learning framework for .NET developers. ML.NET also includes Model Builder (a simple UI tool) and CLI to make it super easy to build custom Machine Learning (ML) models using Automated Machine Learning (AutoML).

Hey .NET! Have you tried ML.NET?
Bri AchtmanAugust 21, 2019Aug 21, 201908/21/19

ML.NET is an open source and cross-platform machine learning framework made for .NET developers.
Using ML.NET you can easily build custom machine learning models for scenarios like sentiment analysis, price prediction, sales forecasting, recommendation, image classification, and more.
ML.NET 1.0 was released at //Build 2019,

Announcing F# 4.6
Phillip CarterMarch 29, 2019Mar 29, 201903/29/19

We’re excited to announce general availability of F# 4.6 and the F# tools for Visual Studio 2019! In this post, I’ll show you how to get started, explain the F# 4.6 feature set, give you an update on the F# tools for Visual Studio,

Submit to the Applied F# Challenge!
Phillip CarterFebruary 5, 2019Feb 5, 201902/5/19

This post was written by Lena Hall, a Senior Cloud Developer Advocate at Microsoft.
F# Software Foundation has recently announced their new initiative — Applied F# Challenge! We encourage you to participate and send your submissions about F# on Azure through the participation form.

Announcing ML.NET 0.9 – Machine Learning for .NET
Cesar De la TorreJanuary 10, 2019Jan 10, 201901/10/19

 

Announcing ML.NET 0.9 – Machine Learning for .NET

ML.NET is an open-source and cross-platform machine learning framework (Windows, Linux, macOS) for .NET developers. Using ML.NET, developers can leverage their existing tools and skillsets to develop and infuse custom AI into their applications by creating custom machine learning models.

Announcing ML.NET 0.6 (Machine Learning .NET)
Cesar De la TorreOctober 8, 2018Oct 8, 201810/8/18

Today we’re announcing our latest monthly release: ML.NET 0.6! ML.NET is a cross-platform, open source machine learning framework for .NET developers. We want to enable every .NET developer to train and use machine learning models in their applications and services. If you haven’t tried ML.NET yet,

Maoni

GC Perf Infrastructure – Part 1
maoniDecember 9, 2019Dec 9, 201912/9/19

We open sourced our new GC Perf Infrastructure! It’s now part of the dotnet performance repo. I’ve been meaning to write about it ‘cause some curious minds had been asking when they could use it after I blogged about it last time but didn’t get around to it till now.

GC Perf Infrastructure – Part 0
maoniSeptember 9, 2019Sep 9, 201909/9/19

In this blog entry and some future ones I will be showing off functionalities that our new GC perf infrastructure provides. Andy and I have been working on it (he did all the work; I merely played the consultant role). We will be open sourcing it soon and I wanted to give you some examples of using it and you can add these to your repertoire of perf analysis techniques when it’s available.

ML.NET

February ML.NET Model Builder Updates
Bri AchtmanMarch 2, 2020Mar 2, 202003/2/20

With the ML.NET Model Builder, create custom machine learning models for scenarios like sentiment analysis, price prediction, and more without any machine learning experience and without leaving the .NET ecosystem!

An Introduction to DataFrame
Prashanth GovindarajanDecember 16, 2019Dec 16, 201912/16/19

Last month, we announced .NET support for Jupyter notebooks, and showed how to use them to work with .NET for Apache Spark and ML.NET. Today, we’re announcing the preview of a DataFrame type for .NET to make data exploration easy. If you’ve used Python to manipulate data in notebooks,

ML.NET Model Builder Updates
Bri AchtmanNovember 12, 2019Nov 12, 201911/12/19

ML.NET is a cross-platform, machine learning framework for .NET developers, and Model Builder is the UI tooling in Visual Studio that uses Automated Machine Learning (AutoML) to easily allow you to train and consume custom ML.NET models.

Announcing ML.NET 1.4 general availability (Machine Learning for .NET)
Cesar De la TorreNovember 6, 2019Nov 6, 201911/6/19

Coinciding with the Microsoft Ignite 2019 conference, we are thrilled to announce the GA release of ML.NET 1.4 and updates to Model Builder in Visual Studio, with exciting new machine learning features that will allow you to innovate your .NET applications.

ML.NET and Model Builder at .NET Conf 2019 (Machine Learning for .NET)
Cesar De la TorreSeptember 24, 2019Sep 24, 201909/24/19

We are excited today to announce updates to Model Builder and improvements in ML.NET. You can learn more in the “What’s new in ML.NET?.” session at .NET Conf.
ML.NET is an open-source and cross-platform machine learning framework (Windows, Linux, macOS) for .NET developers.

Announcing ML.NET 1.4 Preview and Model Builder updates (Machine Learning for .NET)
Cesar De la TorreSeptember 3, 2019Sep 3, 201909/3/19

We are excited to announce ML.NET 1.4 Preview and updates to Model Builder and CLI.
ML.NET is an open-source and cross-platform machine learning framework for .NET developers. ML.NET also includes Model Builder (a simple UI tool) and CLI to make it super easy to build custom Machine Learning (ML) models using Automated Machine Learning (AutoML).

Hey .NET! Have you tried ML.NET?
Bri AchtmanAugust 21, 2019Aug 21, 201908/21/19

ML.NET is an open source and cross-platform machine learning framework made for .NET developers.
Using ML.NET you can easily build custom machine learning models for scenarios like sentiment analysis, price prediction, sales forecasting, recommendation, image classification, and more.
ML.NET 1.0 was released at //Build 2019,

Announcing ML.NET 1.2 and Model Builder updates (Machine Learning for .NET)
Cesar De la TorreJuly 17, 2019Jul 17, 201907/17/19

We are excited to announce ML.NET 1.2 and updates to Model Builder and the CLI. ML.NET is an open-source and cross-platform machine learning framework for .NET developers. ML.NET also includes Model Builder (a simple UI tool for Visual Studio) and the ML.NET CLI (Command-line interface) to make it super easy to build custom Machine Learning (ML) models using Automated Machine Learning (AutoML).

Announcing ML.NET 1.1 and Model Builder updates (Machine Learning for .NET)
Cesar De la TorreJune 11, 2019Jun 11, 201906/11/19

ML.NET is an open-source and cross-platform machine learning framework (Windows, Linux, macOS) for .NET developers.
ML.NET offers Model Builder Model Builder (a simple UI tool for Visual Studio) and CLI to make it super easy to build custom ML Models using AutoML.

Submit to the Applied F# Challenge!
Phillip CarterFebruary 5, 2019Feb 5, 201902/5/19

This post was written by Lena Hall, a Senior Cloud Developer Advocate at Microsoft.
F# Software Foundation has recently announced their new initiative — Applied F# Challenge! We encourage you to participate and send your submissions about F# on Azure through the participation form.

.NET

Work flow of diagnosing memory performance issues – Part 1
maoniApril 12, 2020Apr 12, 202004/12/20

Work flow of diagnosing memory performance issues – Part 0
In this blog post I’ll talk a bit about contributing to PerfView and then continue with the GCStats analysis. You can skip to the analysis part directly if you like.
One of the frustrating things for me when it comes to tooling is there are a lot of memory perf tools out there but very few are targeting the common types of customers I normally work with.

Work flow of diagnosing memory performance issues – Part 0
maoniApril 5, 2020Apr 5, 202004/5/20

I wanted to describe what I do to diagnose memory perf issues, or rather the common part of various work flows of doing such diagnostics. Diagnosing performance issues can take many forms because there’s no fixed steps you follow. But I’ll try to break it down into basic blocks that get invoked for a variety of diagnostics.

Regex Performance Improvements in .NET 5
AvatarApril 2, 2020Apr 2, 202004/2/20

For .NET 5, we’ve invested in some significant improvements to the Regex engine. On many of the expressions we’ve tried, these changes routinely result in throughput improvements of 3-6x, and in some cases, much more. In this post, I’ll walk through some of the myriad of changes that have gone into System.Text.RegularExpressions in .NET 5.

Image ef5preview2
Announcing Entity Framework Core 5.0 Preview 2
Jeremy LiknessApril 2, 2020Apr 2, 202004/2/20

Today we are excited to announce the second preview release of EF Core 5.0. Improvements include support for C# attributes to specify a backing field, complete discriminator mapping, and performance improvements with SQLite.

Announcing .NET 5.0 Preview 2
AvatarApril 2, 2020Apr 2, 202004/2/20

Today, we’re releasing .NET 5.0 Preview 2. It contains a set of smaller features and performance improvements. We’re continuing to work on the bigger features that will define the 5.0 release, some of which are starting to show up as initial designs at dotnet/designs.

.NET for Apache® Spark™ In-Memory DataFrame Support
Brigit MurtaughMarch 30, 2020Mar 30, 202003/30/20

.NET for Apache Spark is aimed at making Apache® Spark™, and thus the exciting world of big data analytics, accessible to .NET developers. .NET for Spark can be used for processing batches of data, real-time streams, machine learning, and ad-hoc query.

Helping Customers Effectively
maoniMarch 30, 2020Mar 30, 202003/30/20

I have to put a disclaimer here since this is not the usual type of blog posts I write. I’m by no means a master at communication. This is just what I thought that seemed to work well. YMMV of course.

Balancing work on GC threads
maoniMarch 28, 2020Mar 28, 202003/28/20

In Server GC, each GC thread will work on its heap in parallel (that’s a simplistic view and is not necessarily true for all phases but on the high level it’s exact the idea of a parallel GC). So that alone means work is already split between GC threads.

.NET Core March 2020 Updates – 2.1.17 and 3.1.3
Rahul Bhandari (MSFT)March 24, 2020Mar 24, 202003/24/20

Today, we are releasing the .NET Core March 2020 Update. These updates only contain non-security fixes. See the individual release notes for details on updated packages.
NOTE: If you are a Visual Studio user, there are MSBuild version requirements so use only the .NET Core SDK supported for each Visual Studio version.

Catch up on the latest .NET Productivity features
Mika DumontMarch 24, 2020Mar 24, 202003/24/20

The Roslyn team continuously works to provide tooling that deeply understands the code you are writing in-order to help you be more productive. In this post, I’ll cover some of the latest .NET Productivity features available in Visual Studio 2019.

Tooling improvements
The feature that I’m most excited about is the new Go To Base command.

.NET Core

Image ef5preview2
Announcing Entity Framework Core 5.0 Preview 2
Jeremy LiknessApril 2, 2020Apr 2, 202004/2/20

Today we are excited to announce the second preview release of EF Core 5.0. Improvements include support for C# attributes to specify a backing field, complete discriminator mapping, and performance improvements with SQLite.

Async ValueTask Pooling in .NET 5
AvatarMarch 16, 2020Mar 16, 202003/16/20

The async/await feature in C# has revolutionized how developers targeting .NET write asynchronous code. Sprinkle some async and await around, change some return types to be tasks, and badda bing badda boom, you’ve got an asynchronous implementation. In theory.
In practice,

Continuous integration and deployment for desktop apps with GitHub Actions
Edward SkrodMarch 12, 2020Mar 12, 202003/12/20

From speaking to desktop developers, we’ve heard that you want to learn how to quickly set up continuous integration and continuous deployment (CI/CD) workflows for your WPF and Windows Forms applications in order to take advantage of the many benefits CI/CD pipelines have to offer,

Announcing the .NET Core Uninstall Tool 1.0!
Sarah OslundMarch 10, 2020Mar 10, 202003/10/20

Today we are releasing the .NET Core Uninstall Tool for Windows and Mac!
Starting in Visual Studio 2019 version 16.3, Visual Studio manages the versions of the SDK and runtime it installs. In previous versions, SDKs and runtimes were left on upgrade in case those versions were targeted or pinned with global.json.

An Introduction to DataFrame
Prashanth GovindarajanDecember 16, 2019Dec 16, 201912/16/19

Last month, we announced .NET support for Jupyter notebooks, and showed how to use them to work with .NET for Apache Spark and ML.NET. Today, we’re announcing the preview of a DataFrame type for .NET to make data exploration easy. If you’ve used Python to manipulate data in notebooks,

ConfigureAwait FAQ
AvatarDecember 11, 2019Dec 11, 201912/11/19

.NET added async/await to the languages and libraries over seven years ago. In that time, it’s caught on like wildfire, not only across the .NET ecosystem, but also being replicated in a myriad of other languages and frameworks. It’s also seen a ton of improvements in .NET,

An Introduction to System.Threading.Channels
AvatarDecember 11, 2019Dec 11, 201912/11/19

“Producer/consumer” problems are everywhere, in all facets of our lives. A line cook at a fast food restaurant, slicing tomatoes that are handed off to another cook to assemble a burger, which is handed off to a register worker to fulfill your order,

GC Perf Infrastructure – Part 1
maoniDecember 9, 2019Dec 9, 201912/9/19

We open sourced our new GC Perf Infrastructure! It’s now part of the dotnet performance repo. I’ve been meaning to write about it ‘cause some curious minds had been asking when they could use it after I blogged about it last time but didn’t get around to it till now.

.NET Core 2.2 will reach End of Life on December 23, 2019
Lee CowardDecember 5, 2019Dec 5, 201912/5/19

.NET Core 2.2 was released on December 4, 2018. As a non-LTS (“Current”) release, it is supported for three months after the next release. .NET Core 3.0 was released on September 23, 2019. As a result, .NET Core 2.2 is supported until December 23,

.NET Core November 2019 Updates – 2.1.14, 2.2.8, and 3.0.1
Jamshed DamkewalaNovember 19, 2019Nov 19, 201911/19/19

Today, we are releasing the .NET Core November 2019 Update. These updates only contain non-security fixes. See the individual release notes for details on updated packages.
NOTE: If you are a Visual Studio user, there are MSBuild version requirements so use only the .NET Core SDK supported for each Visual Studio version.

.NET Framework

.NET Framework February 2020 Preview of Quality Rollup
Tara OverfieldFebruary 25, 2020Feb 25, 202002/25/20

Today, we are releasing the February 2020 Preview of Quality Rollup Updates for .NET Framework.
Quality and Reliability
This release contains the following quality and reliability improvements.
CLR1

Addresses an issue with rare crashes or deadlocks that could occur if a GC occurs while another thread is running NGen’ed code which makes the initial call into a static method within the same module where one or more parameter types involve type-forwarded value types.

.NET Framework February 2020 Security and Quality Rollup
Tara OverfieldFebruary 11, 2020Feb 11, 202002/11/20

Today, we are releasing the February 2020 Security and Quality Rollup Updates for .NET Framework.
Security
The February Security and Quality Rollup Update does not contain any new security fixes. See January 2020 Security and Quality Rollup for the latest security updates.

.NET Framework January Preview of Quality Rollup
Tara OverfieldJanuary 23, 2020Jan 23, 202001/23/20

Today, we are releasing the January 2020 Preview of Quality Rollup Updates for .NET Framework.
Quality and Reliability
This release contains the following quality and reliability improvements.
Acquistion & Deployment

Addresses an issue where the installation of .NET 4.8 on Windows machines prior to 1809 build prevents .NET-specific settings to be migrated during Windows upgrade to build 1809.

We made Windows Server Core container images >40% smaller
AvatarDecember 9, 2019Dec 9, 201912/9/19

Over the past year, we’ve been working with the Windows Server team to make Windows Server Core container images a lot smaller. They are now 40% smaller! The Windows Server team has already published the new images in the Server Core Insider Docker repo,

GC Perf Infrastructure – Part 1
maoniDecember 9, 2019Dec 9, 201912/9/19

We open sourced our new GC Perf Infrastructure! It’s now part of the dotnet performance repo. I’ve been meaning to write about it ‘cause some curious minds had been asking when they could use it after I blogged about it last time but didn’t get around to it till now.

Announcing ML.NET 1.4 general availability (Machine Learning for .NET)
Cesar De la TorreNovember 6, 2019Nov 6, 201911/6/19

Coinciding with the Microsoft Ignite 2019 conference, we are thrilled to announce the GA release of ML.NET 1.4 and updates to Model Builder in Visual Studio, with exciting new machine learning features that will allow you to innovate your .NET applications.

.NET Framework October 2019 Security and Quality Rollup
AvatarOctober 8, 2019Oct 8, 201910/8/19

Today, we are releasing the October 2019 Security and Quality Rollup and Cumulative Updates for .NET Framework.
Security
No new security fixes. See September 2019 Security and Quality Rollup for the latest security updates.
Quality and Reliability
This release contains the following quality and reliability improvements.

.NET Framework September 2019 Security and Quality Rollup
AvatarSeptember 10, 2019Sep 10, 201909/10/19

Today, we are releasing the September 2019 Cumulative Update, Security and Quality Rollup, and Security Only Update for .NET Framework.
Security
CVE-2019-1142– .NET Framework Elevation of Privilege Vulnerability
An elevation of privilege vulnerability exists when the .NET Framework common language runtime (CLR) allows file creation in arbitrary locations.

.NET Framework August 30, 2019 Cumulative Update for Windows 10 version 1903
AvatarAugust 30, 2019Aug 30, 201908/30/19

The August 2019 Cumulative Update for .NET Framework 3.5 and 4.8 on Windows 10 version 1903 was released.
Quality and Reliability
This release contains the following quality and reliability improvements.

Addresses a crash that occurs after enumerating event logs.
Addresses a regression caused by the fix for the issue involving bindings with DataContext explicitly on the binding path.

.NET Framework August 2019 Preview of Quality Rollup
AvatarAugust 20, 2019Aug 20, 201908/20/19

Today, we are releasing the August 2019 Preview of Quality Rollup.
Quality and Reliability
This release contains the following quality and reliability improvements.
BCL1

Addresses a crash that occurs after enumerating event logs. [910822]

1 Base Class Library (BCL)
 
Getting the Update
The Preview of Quality Rollup is available via Windows Update,

.NET Internals

Async ValueTask Pooling in .NET 5
AvatarMarch 16, 2020Mar 16, 202003/16/20

The async/await feature in C# has revolutionized how developers targeting .NET write asynchronous code. Sprinkle some async and await around, change some return types to be tasks, and badda bing badda boom, you’ve got an asynchronous implementation. In theory.
In practice,

Performance

Async ValueTask Pooling in .NET 5
AvatarMarch 16, 2020Mar 16, 202003/16/20

The async/await feature in C# has revolutionized how developers targeting .NET write asynchronous code. Sprinkle some async and await around, change some return types to be tasks, and badda bing badda boom, you’ve got an asynchronous implementation. In theory.
In practice,

ConfigureAwait FAQ
AvatarDecember 11, 2019Dec 11, 201912/11/19

.NET added async/await to the languages and libraries over seven years ago. In that time, it’s caught on like wildfire, not only across the .NET ecosystem, but also being replicated in a myriad of other languages and frameworks. It’s also seen a ton of improvements in .NET,

An Introduction to System.Threading.Channels
AvatarDecember 11, 2019Dec 11, 201912/11/19

“Producer/consumer” problems are everywhere, in all facets of our lives. A line cook at a fast food restaurant, slicing tomatoes that are handed off to another cook to assemble a burger, which is handed off to a register worker to fulfill your order,

GC Perf Infrastructure – Part 1
maoniDecember 9, 2019Dec 9, 201912/9/19

We open sourced our new GC Perf Infrastructure! It’s now part of the dotnet performance repo. I’ve been meaning to write about it ‘cause some curious minds had been asking when they could use it after I blogged about it last time but didn’t get around to it till now.

GC Perf Infrastructure – Part 0
maoniSeptember 9, 2019Sep 9, 201909/9/19

In this blog entry and some future ones I will be showing off functionalities that our new GC perf infrastructure provides. Andy and I have been working on it (he did all the work; I merely played the consultant role). We will be open sourcing it soon and I wanted to give you some examples of using it and you can add these to your repertoire of perf analysis techniques when it’s available.

Hardware Intrinsics in .NET Core
AvatarSeptember 3, 2019Sep 3, 201909/3/19

Several years ago, we decided that it was time to support SIMD code in .NET. We introduced the System.Numerics namespace with Vector2, Vector3, Vector4, Vector<T>, and related types. These types expose a general-purpose API for creating, accessing, and operating on them using hardware vector instructions (when available).

Performance Improvements in .NET Core 3.0
AvatarMay 15, 2019May 15, 201905/15/19

Take a tour through some of the many improvements, big and small, that have gone into the .NET Core 3.0 runtime and core libraries to make apps and services leaner and faster.

Making CPU configuration better for GC on machines with > 64 CPUs
maoniApril 3, 2019Apr 3, 201904/3/19

If you are running Windows on a machine with 64 CPUs, you’ll need to use this feature called the CPU groups for your process to be able to use more than 64 CPUs. At some point in the far distant past,

You Should Never See This Callstack in Production
maoniOctober 9, 2018Oct 9, 201810/9/18

A customer who just experienced some server outage asked us for help as they thought it was due to some very long GC pauses. I thought this diagnostics exercise might be useful for other folks as well so I am sharing it with you.

Middle Ground between Server and Workstation GC
maoniOctober 2, 2018Oct 2, 201810/2/18

A long time ago I wrote about using Workstation GC on server applications when you have many instances of your server app running on the same machine. By default Server GC will treat the process as owning the machine so it uses all CPUs to do the GC work.

Security

.NET Core July 2019 Updates – 2.1.12 and 2.2.6
AvatarJuly 9, 2019Jul 9, 201907/9/19

Today, we are releasing the .NET Core July 2019 Update. These updates contain security and reliability fixes. See the individual release notes for details on updated packages.
NOTE: If you are a Visual Studio user, there are MSBuild version requirements so use only the .NET Core SDK supported for each Visual Studio version.

.NET Core April 2019 Updates – 2.1.10 and 2.2.4
AvatarApril 9, 2019Apr 9, 201904/9/19

Today, we are releasing the .NET Core April 2019 Update. These updates contain security and reliability fixes. See the individual release notes for details on included fixes.

.NET Core 2.2.4 and .NET Core SDK 2.2.106 ( Download | Release Notes )
.NET Core 2.1.10 and .NET Core SDK 2.1.506 ( Download | Release Notes)

Security
Microsoft Security Advisory CVE-2019-0815: ASP.NET Core Denial of Service Vulnerability
A denial of service vulnerability exists in ASP.NET Core 2.2 where,

Submit to the Applied F# Challenge!
Phillip CarterFebruary 5, 2019Feb 5, 201902/5/19

This post was written by Lena Hall, a Senior Cloud Developer Advocate at Microsoft.
F# Software Foundation has recently announced their new initiative — Applied F# Challenge! We encourage you to participate and send your submissions about F# on Azure through the participation form.

.NET Framework January 2019 Security and Quality Rollup
Tara OverfieldJanuary 8, 2019Jan 8, 201901/8/19

Today, we are releasing the January 2019 Security and Quality Rollup.
Security
CVE-2019-0545 – Windows Security Feature Bypass Vulnerability
This security update resolves a vulnerability in Microsoft .NET Framework that may cause an information disclosure that allows bypassing Cross-origin Resource Sharing (CORS) configurations.

.NET Framework December 2018 Security and Quality Rollup
Tara OverfieldDecember 11, 2018Dec 11, 201812/11/18

Today, we are releasing the December 2018 Security and Quality Rollup.
Security
CVE-2018-8540 – Windows Remote Code Execution Vulnerability
This security update resolves a vulnerability in Microsoft .NET Framework that could allow remote code execution when Microsoft .NET Framework doesn’t validate input correctly.

.NET Framework November 2018 Security and Quality Rollup
Tara OverfieldNovember 13, 2018Nov 13, 201811/13/18

Today, we are releasing the November 2018 Security and Quality Rollup.
Security
No new security fixes. See .NET Framework September 2018 Security and Quality Rollup for the latest security updates.
Quality and Reliability
This release contains the following quality and reliability improvements.

.NET Framework October 2018 Security and Quality Rollup
Tara OverfieldOctober 9, 2018Oct 9, 201810/9/18

Today, we released the October 2018 Security and Quality Rollup.
Security
No new security fixes.  See .NET Framework September 2018 Security and Quality Rollup for the latest security update.
Quality and Reliability
This release contains the following quality and reliability improvements.

TPL

Async ValueTask Pooling in .NET 5
AvatarMarch 16, 2020Mar 16, 202003/16/20

The async/await feature in C# has revolutionized how developers targeting .NET write asynchronous code. Sprinkle some async and await around, change some return types to be tasks, and badda bing badda boom, you’ve got an asynchronous implementation. In theory.
In practice,

ConfigureAwait FAQ
AvatarDecember 11, 2019Dec 11, 201912/11/19

.NET added async/await to the languages and libraries over seven years ago. In that time, it’s caught on like wildfire, not only across the .NET ecosystem, but also being replicated in a myriad of other languages and frameworks. It’s also seen a ton of improvements in .NET,

An Introduction to System.Threading.Channels
AvatarDecember 11, 2019Dec 11, 201912/11/19

“Producer/consumer” problems are everywhere, in all facets of our lives. A line cook at a fast food restaurant, slicing tomatoes that are handed off to another cook to assemble a burger, which is handed off to a register worker to fulfill your order,

Visual Studio

The F# development home on GitHub is now dotnet/fsharp
Phillip CarterMay 20, 2019May 20, 201905/20/19

TL;DR We’ve moved the F# GitHub repository from microsoft/visualfsharp to dotnet/fsharp, as specified in the corresponding RFC.

F# has a somewhat strange history in its name and brand. If we roll back the clocks to the year 2015, F# sort of had two identities.

Visual Studio 2019 .NET productivity
KendraHavensApril 2, 2019Apr 2, 201904/2/19

Your friendly neighborhood .NET productivity team (aka. Roslyn) focuses a lot on improving the .NET coding experience. Sometimes it’s the little refactorings and code fixes that really improve your workflow. You may have seen many improvements in the previews, but for all of you who were eagerly awaiting the GA release here’s a few features you may enjoy!

Announcing F# 4.6
Phillip CarterMarch 29, 2019Mar 29, 201903/29/19

We’re excited to announce general availability of F# 4.6 and the F# tools for Visual Studio 2019! In this post, I’ll show you how to get started, explain the F# 4.6 feature set, give you an update on the F# tools for Visual Studio,

Microsoft’s Developer Blogs are Getting an Update
Jayme SingletonFebruary 13, 2019Feb 13, 201902/13/19

In the coming days, we’ll be moving our developer blogs to a new platform with a modern, clean design and powerful features that will make it easy for you to discover and share great content. This week, you’ll see the Visual Studio,

Announcing F# 4.6 Preview
Phillip CarterJanuary 24, 2019Jan 24, 201901/24/19

F# 4.6 is now fully released. See the announcement blog post for more.
We’re excited to announce that Visual Studio 2019 will ship a new version of F# when it releases: F# 4.6!
F# 4.6 is a smaller update to the F# language,

.NET Core tooling update for Visual Studio 2019 Preview 2
Phillip CarterJanuary 24, 2019Jan 24, 201901/24/19

Another preview of Visual Studio 2019, another update on the cool stuff going into it!
We’re pleased to announce some updates to the .NET Core tools for Visual Studio 2019. You can try these changes out starting with Preview 2. We’d love for you to try out these new features and give us feedback.

.NET Core tooling update for Visual Studio 2017 version 15.9
Phillip CarterNovember 13, 2018Nov 13, 201811/13/18

Update! Starting with Visual Studio 2019, the option has moved to:
Tools Options Environment Preview Features
Old post for posterity:
Starting with Visual Studio 2017 version 15.9, we’ve changed how the Visual Studio tooling for .NET consumes .NET Core SDKs. Prior to this change,

Announcing F# 4.5
Phillip CarterAugust 14, 2018Aug 14, 201808/14/18

Today, we’re incredibly pleased to announce general availability of F# 4.5.
This post will walk through the changes in F# 4.5 (just like the preview post), then show some updates to F# tooling, and finally talk a bit about where what we’re thinking about for the next F# version.

F# language and tools update for Visual Studio 2017 version 15.7
Phillip CarterMay 8, 2018May 8, 201805/8/18

We’re excited to share updates about changes to F# and F# tools which shipped with the Visual Studio 2017 version 15.7 release. Let’s dive in!
Type Providers now support .NET Standard
For those who aren’t familiar with Type Providers, they are a feature of F# which allow you to get IntelliSense for data.

F# language and tools update for Visual Studio 2017 version 15.6
Phillip CarterMarch 6, 2018Mar 6, 201803/6/18

With the release of Visual Studio 2017 version 15.6, we’re excited to share updates to the F# language and core library, F# tooling in Visual Studio, and infrastructure updates that concern OSS contributors. Let’s dive in!
F# language and core library updates
Some foundational changes for the F# language and core library have been made,

WPF

Continuous integration and deployment for desktop apps with GitHub Actions
Edward SkrodMarch 12, 2020Mar 12, 202003/12/20

From speaking to desktop developers, we’ve heard that you want to learn how to quickly set up continuous integration and continuous deployment (CI/CD) workflows for your WPF and Windows Forms applications in order to take advantage of the many benefits CI/CD pipelines have to offer,

.NET Framework February 2020 Security and Quality Rollup
Tara OverfieldFebruary 11, 2020Feb 11, 202002/11/20

Today, we are releasing the February 2020 Security and Quality Rollup Updates for .NET Framework.
Security
The February Security and Quality Rollup Update does not contain any new security fixes. See January 2020 Security and Quality Rollup for the latest security updates.

Continuously deploy and monitor your UWP, WPF, and Windows Forms app with App Center
Winnie Li (MSFT)October 31, 2019Oct 31, 201910/31/19

App Center is an integrated developer solution with the mission of helping developers build better apps. Last week, we announced General Availability support of distribute, analytics and diagnostics service for WPF and Windows Forms desktop applications. We also expanded our existing UWP offerings to include crash and error reporting for sideloaded UWP apps.

Migrating a Sample WPF App to .NET Core 3 (Part 2)
AvatarJune 10, 2019Jun 10, 201906/10/19

In part 1 of this blog series, I began the process of porting a sample WPF app to .NET Core. In that post, I described the .NET Core migration process as having four steps:

We previously went through the first two steps –

Migrating a Sample WPF App to .NET Core 3 (Part 1)
AvatarJune 10, 2019Jun 10, 201906/10/19

Olia recently wrote a post about how to port a WinForms app from .NET Framework to .NET Core. Today, I’d like to follow that up by walking through the steps to migrate a sample WPF app to .NET Core 3. Many of these steps will be familiar from Olia’s post,

Porting desktop apps to .NET Core
Olia GavryshMay 28, 2019May 28, 201905/28/19

Since I’ve been working with the community on porting desktop applications from .NET Framework to .NET Core, I’ve noticed that there are two camps of folks: some want a very simple and short list of instructions to get their apps ported to .NET Core while others prefer a more principled approach with more background information.

Announcing .NET Core 3 Preview 4
AvatarApril 18, 2019Apr 18, 201904/18/19

Today, we are announcing .NET Core 3.0 Preview 4. It includes a chart control for Windows Forms, HTTP/2 support, GC updates to use less memory, support for CPU limits with Docker, the addition of PowerShell in .NET Core SDK Docker container images,

How to port desktop applications to .NET Core 3.0
Olia GavryshFebruary 26, 2019Feb 26, 201902/26/19

In this post, I will describe how to port a desktop application from .NET Framework to .NET Core. I picked a WinForms application as an example. Steps for WPF application are similar and I’ll describe what needs to be done different for WPF as we go.

Open Sourcing XAML Behaviors for WPF
karan nandwani msftDecember 10, 2018Dec 10, 201812/10/18

Today, we are excited to announce that we are open sourcing XAML Behaviors for WPF.
In the past, we open sourced XAML Behaviors for UWP which has been a great success and the Behaviors NuGet package has been downloaded over 500k times.

Are your Windows Forms and WPF applications ready for .NET Core 3.0?
Olia GavryshAugust 8, 2018Aug 8, 201808/8/18

Download Portability Analyzer (2.37 MB)
At Build 2018 we announced that we are enabling Windows desktop applications (Windows Forms and Windows Presentation Framework (WPF)) with .NET Core 3.0. You will be able to run new and existing Windows desktop applications on .NET Core and enjoy all the benefits that .NET Core has to offer,

XAML

Open Sourcing XAML Behaviors for WPF
karan nandwani msftDecember 10, 2018Dec 10, 201812/10/18

Today, we are excited to announce that we are open sourcing XAML Behaviors for WPF.
In the past, we open sourced XAML Behaviors for UWP which has been a great success and the Behaviors NuGet package has been downloaded over 500k times.