.NET 9 Release Candidate 1を発表

The .NET Framework, a comprehensive development platform, has been a cornerstone of Microsoft's ecosystem for over two decades. It provides a rich set of class libraries, tools, and programming languages (like C#, VB.NET, and F#) that enable developers to create a wide range of applications, from desktop software to web services and mobile apps. With the approaching release of .NET 9, Microsoft continues its commitment to delivering a modern, high-performance, and cross-platform development environment.

Microsoft has announced the release of .NET 9 Release Candidate 1. This Microsoft blog post highlights what's new in this release, and includes links to download .NET 9 RC1. The .NET 9 update has a special focus on cloud-native apps and performance, and RC1 has made updates and improvements to many of the elements of .NET 9, including:

• .NET 9 Runtime - Includes a new attribute model for feature switches with trimming support.
• .NET Libraries - Multiple updates, including collection types and cryptography.
• .NET SDK - Introduces workload sets, where all your workloads stay at a single, specific version until explicitly updated.
• ML.NET - An open-source, cross-platform framework that enables integration of custom machine-learning models into .NET applications.
• .NET Aspire - For building observable, production-ready distributed applications.
• Additional updates to ASP.NET Core, .NET MAUI, EF Core, C# 13, and more!

For more information, or to download .NET 9 Release Candidate 1, read the official Microsoft blog post about this release.