.NET 7 Released: Performance, Containers and C# 11

What happened

.NET 7 was released on November 8, 2022, according to the official announcement on the Microsoft .NET DevBlog. Microsoft credited the open-source community with 28,000 contributions from over 8,900 contributors, and described .NET as remaining one of the fastest and most trusted platforms, with an ecosystem of over 330,000 packages.

Unified platform

.NET 7 was the third major release in the .NET unification journey, offering one SDK, one runtime and one base class library to build many types of apps, including cloud, web, desktop, mobile, gaming, IoT and AI. Targeting it was as simple as setting net7.0 as the target framework, with operating-system-specific variants such as net7.0-android, net7.0-ios and net7.0-windows for platform-specific APIs.

Performance and ARM64

The release focused heavily on performance, with many microbenchmarks improving by 10 to 60%. A major theme was ARM64, where Microsoft worked to match the performance parity of x64, enabling LSE atomics instructions for around a 45% win in some concurrency scenarios and rewriting APIs to use cross-platform vector helpers. .NET 7 also expanded architecture support, adding the 64-bit IBM Power (ppc64le) architecture alongside x64, ARM64 and IBM Z.

Modern, cloud-native and C# 11

.NET 7 emphasised modern cloud-native development, making it easier to containerise projects, set up CI/CD in GitHub Actions and achieve observability with OpenTelemetry. It added built-in container support so the SDK could build container images directly, and improved HTTP/3 and minimal APIs. C# 11 and F# 7 arrived alongside, letting developers write less code, and the .NET Upgrade Assistant helped migrate legacy apps, including WCF services via CoreWCF.

Why it mattered

.NET 7 reinforced .NET's position as a fast, unified, cross-platform framework while pushing hard on ARM64 parity and cloud-native workflows. Though a standard-term-support release, it delivered broad performance and productivity gains that set up the LTS .NET 8 that followed.

Related on Skillo

See also: .NET 6 and the unified platform, .NET 8's Native AOT and Aspire.

Sources

• .NET 7 is Available Today (Microsoft DevBlogs)

Published date reflects the original event date (2022-11-08). This article is original Skillo editorial written from the sources above; facts were verified in September 2026.