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Free. Cross-platform. Open source. A developer platform for building all your apps.
September 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!
August 30, 2019Aug 30, 201908/30/19The 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.
August 28, 2019Aug 28, 201908/28/19Producing 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.
August 22, 2019Aug 22, 201908/22/19The .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.
August 22, 2019Aug 22, 201908/22/19This post is a collection of content from David Boike from the Particular.net blog calling out some common problems and solutions for building message based distributed systems. They are relevant to anyone building apps using messaging, and anyone building a Microservice based solution should definitely be interested in the first post about slimming down events.
August 21, 2019Aug 21, 201908/21/19ML.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,
August 20, 2019Aug 20, 201908/20/19Today, 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,
August 19, 2019Aug 19, 201908/19/19In preview7 a new package was added to the Microsoft.Extensions set of packages that enables integration with systemd. For the Windows focused, systemd allows similar functionality to Windows Services, there is a post on how to do what we discuss here for Windows Services in this post.
August 13, 2019Aug 13, 201908/13/19We are happy to announce that Microsoft .NET Framework 4.8 is now available on Windows Update, Windows Server Update Services (WSUS) and Microsoft Update (MU) Catalog. This release includes quality and reliability fixes based on feedback since the .NET Framework 4.8 initial release.
August 13, 2019Aug 13, 201908/13/19Today, 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,
AI Machine Learning
August 21, 2019Aug 21, 201908/21/19ML.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,
July 17, 2019Jul 17, 201907/17/19We 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).
February 5, 2019Feb 5, 201902/5/19This 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.
![Bri Achtman [MSFT]](https://devblogs.microsoft.com/dotnet/wp-content/uploads/sites/10/2019/02/BriAchtman.jpeg){kind=avatar}
January 9, 2019Jan 9, 201901/9/19ML.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.
December 4, 2018Dec 4, 201812/4/18ML.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,
November 8, 2018Nov 8, 201811/8/18We’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,
October 10, 2018Oct 10, 201810/10/18This 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.
October 8, 2018Oct 8, 201810/8/18Today 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,
November 15, 2017Nov 15, 201711/15/17Overview
Tensor is an exchange type for homogenous multi-dimensional data for 1 to N dimensions. The motivation behind introducing Tensor<T> is to make it easy for Machine Learning library vendors like CNTK, Tensorflow, Caffe, Scikit-Learn to port their libraries over to .NET with minimal dependencies in place.
ASP.NET
April 9, 2019Apr 9, 201904/9/19Today, 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,
March 5, 2019Mar 5, 201903/5/19It 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.
February 27, 2018Feb 27, 201802/27/18Connecting 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!
September 26, 2017Sep 26, 201709/26/17Earlier 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,
July 24, 2017Jul 24, 201707/24/17Get 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.
Azure
October 16, 2018Oct 16, 201810/16/18We 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#
September 3, 2019Sep 3, 201909/3/19We 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).
May 16, 2019May 16, 201905/16/19Try .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.
May 15, 2019May 15, 201905/15/19Take 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.
May 14, 2019May 14, 201905/14/19Default 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.
May 6, 2019May 6, 201905/6/19Today, 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,
April 2, 2019Apr 2, 201904/2/19Your 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!
February 27, 2019Feb 27, 201902/27/19Starting with Visual Studio 2019 Preview 4, we'll be adjusting how C# versions are treated in .NET tooling. Firstly, we're adding two new Language Version (LangVersion) values: LatestMajor and Preview. Rad the post to see how they stack up with the currently supported list of values.
December 5, 2018Dec 5, 201812/5/18Take C# 8.0 for a spin
Yesterday we announced the first preview of both Visual Studio 2019 (Making every developer more productive with Visual Studio 2019) and .NET Core 3.0 (Announcing .NET Core 3 Preview 1 and Open Sourcing Windows Desktop Frameworks).
November 12, 2018Nov 12, 201811/12/18Building C# 8.0
The next major version of C# is C# 8.0. It’s been in the works for quite some time, even as we built and shipped the minor releases C# 7.1, 7.2 and 7.3, and I’m quite excited about the new capabilities it will bring.
Docker
May 6, 2019May 6, 201905/6/19Today, 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,
April 29, 2019Apr 29, 201904/29/19DockerCon 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.
Entity Framework
September 16, 2019Sep 16, 201909/16/19We 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.
September 4, 2019Sep 4, 201909/4/19Preview 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.
August 13, 2019Aug 13, 201908/13/19The 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.
June 13, 2019Jun 13, 201906/13/19New 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.
May 8, 2019May 8, 201905/8/19The 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.
April 18, 2019Apr 18, 201904/18/19Today, 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.
December 4, 2018Dec 4, 201812/4/18Today we’re making the final version of EF Core 2.2 available, alongside ASP.NET Core 2.2 and .NET Core 2.2. This is the latest release of our open-source and cross-platform object-database mapping technology.
EF Core 2.2 RTM includes more than a hundred bug fixes and a few new features:
Spatial data support
Spatial data can be used to represent the physical location and shape of objects.
October 17, 2018Oct 17, 201810/17/18Entity Framework Core 2.2 Preview 3 available with a new preview of our data provider for Cosmos DB and updated spatial extensions for various providers. Preview 3 is going to be the last milestone before EF Core 2.2 RTM, so now is your last chance to try the bits and give us feedback if you want to have an impact on the quality and the shape of the APIs in this release.
September 12, 2018Sep 12, 201809/12/18Today we are making EF Core 2.2 Preview 2 available, together with a preview of our data provider for Cosmos DB and new spatial extensions for our SQL Server and in-memory providers.
Obtaining the preview
The preview bits are available on NuGet,
May 30, 2018May 30, 201805/30/18Today we are excited to announce the release of Entity Framework (EF) Core 2.1. This is the latest production-ready release of our open-source and cross-platform data access technology. We are releasing today alongside .NET Core 2.1 and ASP.NET Core 2.1. EF Core 2.1 targets .NET Standard 2.0 and so also runs on .NET Core 2.0 and .NET Framework 4.6.1 or later.
F#
May 20, 2019May 20, 201905/20/19TL;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.
March 29, 2019Mar 29, 201903/29/19We’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,
February 5, 2019Feb 5, 201902/5/19This 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.
January 24, 2019Jan 24, 201901/24/19F# 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,
August 14, 2018Aug 14, 201808/14/18Today, 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.
July 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. For using F# 4.5 in a Windows build server, we recommend (in order of preference), Using the .NET SDK, the FSharp.Compiler.Tools package, or the Visual Studio Build Tools SKU.
Better async stack traces Starting with F# 4.5 and FSharp.Core 4.5.0, stack traces for async computation expressions: Reported line numbers now correspond to the failing user code Non-user code is no longer emitted For example, consider the following DSL and its usage with an FSharp.Core version prior to 4.5.0: Note that both the f1 and f2 functions are called twice.
May 8, 2018May 8, 201805/8/18We’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.
March 6, 2018Mar 6, 201803/6/18With 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,
November 15, 2017Nov 15, 201711/15/17We’re pleased to announce that Visual Studio 2017 15.5 Preview 4 now supports F# projects targeting .NET Core, .NET Standard, and .NET Framework through the .NET Core SDK. Some of you have noticed various levels of this support in the first,
September 26, 2017Sep 26, 201709/26/17Earlier 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,
GC
September 9, 2019Sep 9, 201909/9/19In 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
May 31, 2016May 31, 201605/31/16I 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
September 3, 2019Sep 3, 201909/3/19We 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).
August 21, 2019Aug 21, 201908/21/19ML.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,
March 29, 2019Mar 29, 201903/29/19We’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,
February 5, 2019Feb 5, 201902/5/19This 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.
January 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.
October 8, 2018Oct 8, 201810/8/18Today 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,
May 31, 2017May 31, 201705/31/17Why you should use F#
This post was written by Phillip Carter and Mads Torgersen. Both work on languages on the .NET team.
At Build 2017, we presented a tech talk entitled “Why You Should Use F#”. However, not everyone can attend Build,
Maoni
September 9, 2019Sep 9, 201909/9/19In 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
September 3, 2019Sep 3, 201909/3/19We 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).
August 21, 2019Aug 21, 201908/21/19ML.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,
July 17, 2019Jul 17, 201907/17/19We 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).
June 11, 2019Jun 11, 201906/11/19ML.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.
February 5, 2019Feb 5, 201902/5/19This 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.
January 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.
November 8, 2018Nov 8, 201811/8/18We’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,
October 8, 2018Oct 8, 201810/8/18Today 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,
August 7, 2018Aug 7, 201808/7/18A few months ago we released ML.NET 0.1 at //Build 2018., ML.NET is a cross-platform, open source machine learning framework for .NET developers. We’ve gotten great feedback so far and would like to thank the community for your engagement as we continue to develop ML.NET together in the open.
May 7, 2018May 7, 201805/7/18Today at //Build 2018, we are excited to announce the preview of ML.NET, a cross-platform, open source machine learning framework. ML.NET will allow .NET developers to develop their own models and infuse custom ML into their applications without prior expertise in developing or tuning machine learning models.
.NET
September 16, 2019Sep 16, 201909/16/19We 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.
September 4, 2019Sep 4, 201909/4/19Preview 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.
August 22, 2019Aug 22, 201908/22/19This post is a collection of content from David Boike from the Particular.net blog calling out some common problems and solutions for building message based distributed systems. They are relevant to anyone building apps using messaging, and anyone building a Microservice based solution should definitely be interested in the first post about slimming down events.
August 7, 2019Aug 7, 201908/7/19It’s about two years ago that I announced .NET Standard 2.0. Since then we’ve been working hard to increase the set of .NET Standard-based libraries for .NET. This includes many of the BCL components, such as the Windows Compatibility Pack, but also other popular libraries,
July 10, 2019Jul 10, 201907/10/19Roslyn, the .NET compiler platform, helps you catch bugs even before you run your code. One example is Roslyn’s spellcheck analyzer that is built into Visual Studio. Let’s say you are creating a static method and misspelled the word static as statc.
July 9, 2019Jul 9, 201907/9/19Today, 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.
June 20, 2019Jun 20, 201906/20/19In our previous post, we announced dotnet try a global tool which allows developers to create interactive workshops and documentation. Tutorials created with dotnet try let users start learning without having to install an editor. Features like IntelliSense and live diagnostics give users a sophisticated learning and editing experience.
June 10, 2019Jun 10, 201906/10/19In 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 –
June 10, 2019Jun 10, 201906/10/19Olia 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,
![Scott Hunter [MSFT]](https://devblogs.microsoft.com/dotnet/wp-content/uploads/sites/10/2019/02/scotthunter-1-150x150.png){kind=avatar}
June 7, 2019Jun 7, 201906/7/19At the Build conference in May 2019, we mentioned that, after we add WinForms, WPF and Entity Framework 6 to .NET Core 3.0, we do not plan to add any more of the technologies from .NET Framework to .NET Core.
This means we will not be adding ASP.NET Web Forms,
.NET Core
September 16, 2019Sep 16, 201909/16/19We 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.
September 9, 2019Sep 9, 201909/9/19In 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.
September 4, 2019Sep 4, 201909/4/19Preview 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.
September 4, 2019Sep 4, 201909/4/19Today, 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.
September 3, 2019Sep 3, 201909/3/19Several 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).
August 22, 2019Aug 22, 201908/22/19This post is a collection of content from David Boike from the Particular.net blog calling out some common problems and solutions for building message based distributed systems. They are relevant to anyone building apps using messaging, and anyone building a Microservice based solution should definitely be interested in the first post about slimming down events.
August 19, 2019Aug 19, 201908/19/19In preview7 a new package was added to the Microsoft.Extensions set of packages that enables integration with systemd. For the Windows focused, systemd allows similar functionality to Windows Services, there is a post on how to do what we discuss here for Windows Services in this post.
August 5, 2019Aug 5, 201908/5/19Visual Studio 2019 version 16.3 and .NET Core 3.0 Preview 7 improve the installation experience of .NET Core on Windows. The goal is to reduce the number of .NET Core versions that might be on a machine. The improvements are based on customer feedback and our own experiences as well as laying the groundwork for future improvements.
July 23, 2019Jul 23, 201907/23/19Today, we are announcing .NET Core 3.0 Preview 7. We’ve transitioned from creating new features to polishing the release. Expect a singular focus on quality for the remaining preview releases.
Download .NET Core 3.0 Preview 7 right now on Windows, macOS and Linux.
July 17, 2019Jul 17, 201907/17/19We 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).
.NET Framework
September 10, 2019Sep 10, 201909/10/19Today, 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.
August 30, 2019Aug 30, 201908/30/19The 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.
August 20, 2019Aug 20, 201908/20/19Today, 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,
July 17, 2019Jul 17, 201907/17/19We 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).
July 9, 2019Jul 9, 201907/9/19Today, we are releasing the July 2019 Cumulative Update, Security and Quality Rollup, and Security Only Update for .NET Framework.
Security
CVE-2019-1006 – WCF/WIF SAML Token Authentication Bypass Vulnerability
An authentication bypass vulnerability exists in Windows Communication Foundation (WCF) and Windows Identity Foundation (WIF),
June 27, 2019Jun 27, 201906/27/19Today, we released the June 2019 Cumulative Update for .NET Framework 3.5 and 4.8 on Windows 10 version 1903.
Quality and Reliability
This release contains the following quality and reliability improvements.
Improves the memory allocation and cleanup scheduling behavior of the weak-event pattern.
June 18, 2019Jun 18, 201906/18/19Today, we are releasing the June 2019 Preview of Quality Rollup.
Quality and Reliability
This release contains the following quality and reliability improvements.
WPF1
Addresses an issue in which applications that target .NET Framework 4.7 and later, or that set Switch.System.Windows.Controls.Grid.StarDefinitionsCanExceedAvailableSpace to “false,”
June 10, 2019Jun 10, 201906/10/19In 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 –
June 10, 2019Jun 10, 201906/10/19Olia 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,
June 7, 2019Jun 7, 201906/7/19At the Build conference in May 2019, we mentioned that, after we add WinForms, WPF and Entity Framework 6 to .NET Core 3.0, we do not plan to add any more of the technologies from .NET Framework to .NET Core.
This means we will not be adding ASP.NET Web Forms,
Performance
September 9, 2019Sep 9, 201909/9/19In 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.
September 3, 2019Sep 3, 201909/3/19Several 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).
May 15, 2019May 15, 201905/15/19Take 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.
April 3, 2019Apr 3, 201904/3/19If 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,
October 9, 2018Oct 9, 201810/9/18A 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.
October 2, 2018Oct 2, 201810/2/18A 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.
September 19, 2016Sep 19, 201609/19/16End of last year I mentioned we wanted to provide an API for you to really investigate GC/managed memory related performance called GLAD. Well, the source finally got opened source on github. So GLAD is available. The repo is called PerfView but you actually just need the TraceEvent project (but it’s much easier to just build the whole solution then add the reference to the resulting Microsoft.Diagnostics.Tracing.TraceEvent.dll).
May 31, 2016May 31, 201605/31/16I 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.
Security
July 9, 2019Jul 9, 201907/9/19Today, 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.
April 9, 2019Apr 9, 201904/9/19Today, 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,
February 5, 2019Feb 5, 201902/5/19This 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.
January 8, 2019Jan 8, 201901/8/19Today, 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.
December 11, 2018Dec 11, 201812/11/18Today, 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.
November 13, 2018Nov 13, 201811/13/18Today, 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.
October 9, 2018Oct 9, 201810/9/18Today, 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.
Uncategorized
September 16, 2019Sep 16, 201909/16/19Today, 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.
September 16, 2019Sep 16, 201909/16/19Years 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.
September 10, 2019Sep 10, 201909/10/19Today, 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.
September 4, 2019Sep 4, 201909/4/19Today, 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.
September 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!
August 28, 2019Aug 28, 201908/28/19Producing 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.
August 22, 2019Aug 22, 201908/22/19The .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.
August 13, 2019Aug 13, 201908/13/19We are happy to announce that Microsoft .NET Framework 4.8 is now available on Windows Update, Windows Server Update Services (WSUS) and Microsoft Update (MU) Catalog. This release includes quality and reliability fixes based on feedback since the .NET Framework 4.8 initial release.
August 13, 2019Aug 13, 201908/13/19Today, 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,
August 7, 2019Aug 7, 201908/7/19We would love to hear about your experience with building client applications in .NET. Your feedback will greatly help us to improve the .NET tooling and ensure our roadmap focuses on your needs. Participate in shaping the future of the .NET client development by taking this short survey (5 minutes to complete).
Visual Studio
May 20, 2019May 20, 201905/20/19TL;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.
April 2, 2019Apr 2, 201904/2/19Your 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!
March 29, 2019Mar 29, 201903/29/19We’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,
February 13, 2019Feb 13, 201902/13/19In 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,
January 24, 2019Jan 24, 201901/24/19F# 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,
January 24, 2019Jan 24, 201901/24/19Another 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.
November 13, 2018Nov 13, 201811/13/18Update! 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,
August 14, 2018Aug 14, 201808/14/18Today, 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.
May 8, 2018May 8, 201805/8/18We’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.
March 6, 2018Mar 6, 201803/6/18With 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
June 10, 2019Jun 10, 201906/10/19In 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 –
June 10, 2019Jun 10, 201906/10/19Olia 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,
May 28, 2019May 28, 201905/28/19Since 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.
April 18, 2019Apr 18, 201904/18/19Today, 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,
February 26, 2019Feb 26, 201902/26/19In 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.
December 10, 2018Dec 10, 201812/10/18Today, 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.
August 8, 2018Aug 8, 201808/8/18Download 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,
September 21, 2017Sep 21, 201709/21/17This post describes the new WPF and accessibility features and improvements in .NET Framework 4.7.1. You can try out these features by downloading the Developer Pack, described in the Welcome to the .NET Framework 4.7.1 Early Access blog post.
Accessibility improvements
.NET Framework 4.7.1 brings in a lot of accessibility improvements across different libraries to align with the broad Microsoft product accessibility goals.
July 25, 2017Jul 25, 201707/25/17You can now install the July 2017 Quality Update for WPF. It applies to multiple Windows versions.
This update resolves known issue 4033488. It is recommended on machines that have installed the July 2017 Preview of Quality Rollup or the May 2017 Preview of Quality Rollup.
November 12, 2014Nov 12, 201411/12/14When we introduced WPF back in 2006 (.NET 3.0), the response was absolutely phenomenal. Enterprises, ISV’s, and Microsoft Partners have made the technology central to their business, building amazing vertical solutions and mission critical applications for their customers. This momentum carries forward to today – 10% of all newly created projects in Visual Studio 2013 over the past 60 days are WPF.
XAML
December 10, 2018Dec 10, 201812/10/18Today, 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.
