Getting Started With .NET 7

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.

• How To Install Visual Studio 2022
• Getting Started With Visual Studio 2022 Community Edition

Prerequisites

1. Install Visual Studio 2022 updated version 17.4.0
2. 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.

Publish to a container

Containers are one of the easiest ways to distribute and run a wide variety of applications and services in the cloud. Container images are now a supported output type of the .NET SDK, and you can create containerized versions of your applications using Dotnet publish.

Central package management

Now, you can manage common dependencies in your projects from one location using NuGet's central package management (CPM) feature. To enable it, you add a Directory.Packages.props file to the root of your repository. In this file, set the MSBuild property ManagePackageVersionsCentrally to true and add versions for common package dependency using PackageVersion items.

To get more details about .NET 7.0 Click here

https://learn.microsoft.com/en-us/dotnet/core/whats-new/dotnet-7

Support

.Net 7.0 will be supported for 18 months as a standard-term support (STS). It is supported on multiple operating systems (Windows, Linux, MacOS, Android, iOS/tvOS) including macOS Apple Silicon, and Windows Arm64.

.NET 7 is supported with Visual Studio 2022 and Visual Studio 2022 for Mac. It is not supported in Visual Studio 2019

Connect To Visual Studio 2022 Community Edition and Create Your First Project

Step 1

First, install Visual Studio 2022 in your system.

Step 2

Go to all programs in your systems, we can see Visual Studio 2022 and Visual Studio Installer.

Step 3

Double-click on Visual Studio 2022 and it will open. It looks like the below screenshot. Opening it the first time will take a few minutes.

Creating Your First Project

Click on Create a new Project to create a new project.

You can see various project types there. Choose “Console Application” project type for now.

Select console Application and Click Next.

Give a valid name to your project and select a path for it. Then click Next button.

Now, choose framework .NET 7.0(Standard Term Support). Then click the create button.

 The Console application project structure is shown below,

Modify, program.cs file

Now, build and run the application.

Output

Conclusion

In this article, we explained the basics of .NET 7.0 and what’s new in .NET 7.0 and also create a simple .NET 7.0 Console application and run.