.NET Blog
Free. Cross-platform. Open source. A developer platform for building all your apps.
Featured posts
Announcing .NET 10 Release Candidate 1
.NET 10 Release Candidate 1 is available with improvements across the runtime, SDK, libraries, ASP.NET Core, Blazor, .NET MAUI, and more!
Latest posts
ASP.NET Core updates in .NET 5 Preview 2
![Sourabh Shirhatti [MSFT]](https://devblogs.microsoft.com/dotnet/wp-content/uploads/sites/10/letter-avatar/9228d33c03603017171cd81a0ce66d32.svg){kind=avatar}
.NET 5 Preview2 is now available and is ready for evaluation! .NET 5 will be a current release. Get started To get started with ASP.NET Core in .NET 5.0 Preview2 install the .NET 5.0 SDK. If you're on Windows using Visual Studio, we recommend installing the latest preview of Visual Studio 2019 16.6. If you're on macOS, we recommend installing the latest preview of Visual Studio 2019 for Mac 8.6. Upgrade an existing project To upgrade an existing ASP.NET Core 5.0 preview1 app to ASP.NET Core 5.0 preview2: See the full list of breaking changes in ASP.NET Core 5.0. That’s it! You should now be...
Announcing .NET 5.0 Preview 2
![Rich Lander [MSFT]](https://devblogs.microsoft.com/dotnet/wp-content/uploads/sites/10/letter-avatar/cb895f2fa6fae6447bab144d4f3ec4b3.svg){kind=avatar}
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. The .NET 5.0 Preview 1 post covers what we are planning on building for .NET 5.0. Please take a look at the post and the designs repository and share any feedback you have. And, of course, please install Preview 2, and test any workloads you can with it. You can download .NET 5.0 Preview 2, for Windows, macOS, and Linux: ASP.NET Core and EF ...
.NET for Apache® Spark™ In-Memory DataFrame Support
.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. The DataFrame is one of the core data structures in Spark programming. A DataFrame is a distributed collection of data organized into named columns. In a Spark application, we typically start off by reading input data from a data source, storing it in a DataFrame, and then leveraging functionality like Spark SQL to transform and gain insights from our data. User...
Helping Customers Effectively
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. But I’d be very happy if they help you in some way ‘cause many of us work with customers. And I welcome your thoughts and suggestions. I have talked to customers a lot since I started working on the GC. This is in the context of helping customers to handle and resolve issues they are seeing. 1. The intention of helping should be genuine I am naturally the kind of person who wants to help with coming up with a s...
Balancing work on GC threads
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. But because GC work for some stages can only proceed after all threads are done with their last stage (for example, we can’t have any GC thread start with the plan phase until all GC threads are done with the mark phase so we don’t miss objects that should be marked), we want the amount of GC work balanced on each thread as much as possible so the total pause can...
Blazor WebAssembly 3.2.0 Preview 3 release now available
Blazor WebAssembly 3.2.0 Preview 3 is now available! Check out all the updates and improvements in this release.
.NET Core March 2020 Updates – 2.1.17 and 3.1.3
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. Information needed to make this choice will be seen on the download page. If you use other development environments, we recommend using the latest SDK release. Getting the Update The latest .NET Core updates are available on the .NET Core download page. This update will be included in a futu...
Catch up on the latest .NET Productivity features
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. Go To Base allows you to easily navigate up the inheritance chain. The command is available on the context (right-click) menu of the element that you want to navigate the inheritance hierarchy. Or you can press Alt+Home. Find All References now categorizes the results by ty...
Announcing F# 5 preview 1
We're excited to announce that F# 5 preview 1 is now available! Here's how to get it: If you're using Visual Studio on Windows, you'll need both the .NET 5 preview SDK and Visual Studio Preview installed. Using F# 5 preview You can use F# 5 preview via the .NET 5 preview SDK, or through the .NET and Jupyter Notebooks support. If you're using the .NET 5 preview SDK, check out a sample repository showing off some of what you can do with F# 5. You can play with each of the features there instead of starting from scratch. If you'd rather use F# 5 in your own project, you'll need to add a property and add a...