Introduction
In this article, I am going to explain what’s new in .NET 7.0, what .NET Core is, .Net Core features and benefits, .Net Core Versions, and why we use .Net Core. Latest version of .Net Core is .NET 7.0 and which was released on November 8, 2022 and How to create a simple .NET 7.0 Console application and run.
Read my previous articles, using the below links.
Prerequisites
- Install Visual Studio 2022 updated version 17.4.0
- Install .NET SDK 7.0
What’s New in .NET 7.0?
Microsoft released .NET 7.0 on November 8, 2022. Visual Studio 2022 version 17.4.0 is required to develop .Net 7.0 console application.
.NET 7 is the successor to .NET 6, it focuses on being unified, modern, simple, and first. NET 7 will be supported for only 18 months as standard-term support (STS).
New features in .NET 7
Performance
Performance is a key focus of .NET 7, and all of its features are designed with performance in mind.
- On-stack replacement (OSR) is a complement to tiered compilation. It allows the runtime to change the code executed by a currently running method in the middle of its execution (that is, while it's "on stack"). Long-running methods can switch to more optimized versions mid-execution.
- Profile-guided optimization (PGO) now works with OSR and is easier to enable (by adding <TieredPGO>true</TieredPGO>to your project file). PGO can also instrument and optimize additional things, such as delegates.
- Improved code generation for Arm64.
- Performance improvements to the Mono runtime, which powers Blazor WebAssembly, Android, and iOS apps.
System.Text.Json serialization
.NET 7 includes improvements to System.Text.Json serialization in the following areas:
- Contract customization gives you more control over how types are serialized and deserialized.
- Polymorphic serialization for user-defined type hierarchies.
- Support for required members, which are properties that must be present in the JSON payload for deserialization to succeed.
Generic math
.NET 7 and C# 11 include innovations that allow you to perform mathematical operations
.NET libraries
Many improvements have been made to .NET library APIs.
Observability
.NET 7 makes improvements to observability. Observability helps you understand the state of your app as it scales and as the technical complexity increases.
- The new Activity.CurrentChanged event, which you can use to detect when the span context of a managed thread changes.
.NET SDK
The .NET 7 SDK improves the CLI template experience. It also enables publishing to containers, and central package management with NuGet.
Authoring
Template constraints, a new concept for .NET 7, Constraints help the template engine determine which templates it should show in commands like dotnet new list. You can constrain your template to an operating system, a template engine host (for example, the .NET CLI or New Project dialog in Visual Studio), and an installed workload. You define constraints in your template's configuration file.
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