We’re excited to announce the release of .NET Core 3.0. It includes many improvements, including adding Windows Forms and WPF, adding new JSON APIs, support for ARM64 and improving performance across the board. C# 8 is also part of this release, which includes nullable, async streams, and more patterns. F# 4.7 is included, and focused on relaxing syntax and targeting .NET Standard 2.0. You can start updating existing projects to target .NET Core 3.0 today. The release is compatible with previous versions, making updating easy. 

.NET 5 Preview 6 is now available and is ready for evaluation. Here’s what’s new in this release:

• Blazor WebAssembly template now included
• JSON extension methods for HttpRequest and HttpResponse
• Extension method to allow anonymous access to an endpoint
• Custom handling of authorization failures
• SignalR Hub filters 

Fixed In This Release of Visual Studio 2019 version 16.5

• Team Explorer not loading after update to mandatory latest visual studio version for Visual studio 2019
• Find Highlighting Fails when Matching with Match Case Disabled and Regex Option Enabled

Security Advisory Notice

CVE-2020-1108 .NET Core Denial of Service Vulnerability

A remote unauthenticated attacker could exploit this vulnerability by issuing specially crafted requests to the .NET Core application. The security update addresses the vulnerability by correcting how the .NET Core web application handles web requests.

CVE-2020-1161 .NET Core Denial of Service Vulnerability

A remote unauthenticated attacker could exploit this vulnerability by issuing specially crafted requests to the ASP.NET Core application. The security update addresses the vulnerability by correcting how the ASP.NET Core web application handles web requests. 

We are pleased to announce the release of .NET 9 Preview 7.

You can download Windows Terminal from the Microsoft Store or from the GitHub releases page. Windows Terminal will have monthly updates, starting in July 2020. 

The .NET Core 2.1 RC 1 is now ready for broad testing and for production use.  

This is the first release of a 64-bit Visual Studio and we’d love for you to download it, try it out, and join us in shaping the next major release of Visual Studio with your feedback. 

New Breaking Changes

Angular now compiles with Ivy by default. See Ivy compatibility section.

Typescript 3.4 and 3.5 are no longer supported. Please update to Typescript 3.6.

tslib is now listed as a peer dependency rather than a direct dependency. Users not using the CLI will need to manually install tslib via yarn add tslib or npm install tslib --save. 

Microsoft has announced that the .NET Core 2.0 will be considered "end of life" and thus no longer supported as of October 1, 2018.  .NET Core 2.0 is considered a non-LTS release, and as such Microsoft only commits its support for three months after a successor has been released.  In this case, with .NET Core 2.1 having been released May 31, .NET Core 2.0’s end has come. 

Nullable Reference Types: Migrating a Codebase – A Look at New Language Features in C# 8