README.md

.NET 7 Preview Demos 🚀

This project includes some of the preview feature demos to be released with .NET 7 and C# 11.

For the full set of features please visit,

• What's new in C# 11 - https://docs.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-11
• ASP.NET Core updates in .NET 7 Preview 4 - https://devblogs.microsoft.com/dotnet/asp-net-core-updates-in-dotnet-7-preview-4
• What's new in .NET 7 Preview 4 [WIP] - dotnet/core#7378

Prerequisites 💬

To try out features in this solution, you need to install,

• .NET 7.0 (in preview as at 2022.06.05) - https://dotnet.microsoft.com/en-us/download/dotnet/7.0
• Visual Studio Code - https://code.visualstudio.com/
• k6 Open Source - https://k6.io/open-source/

What's in here? 🙄

Following new features are discussed in this project.

• Required members - https://github.com/dotnet/csharplang/blob/main/proposals/required-members.md#detailed-design
• MemoryCache metrics - dotnet/runtime#50406
• Microseconds and Nanoseconds to TimeSpan, DateTime, DateTimeOffset, and TimeOnly - dotnet/runtime#23799
• New APIs for RegularExpressions - dotnet/runtime#59629, dotnet/runtime#65011
• Infer API controller action parameters that come from services - https://devblogs.microsoft.com/dotnet/asp-net-core-updates-in-dotnet-7-preview-2/#infer-api-controller-action-parameters-that-come-from-services
• Rate limiting middleware - https://devblogs.microsoft.com/dotnet/asp-net-core-updates-in-dotnet-7-preview-4/#rate-limiting-middleware
• INumber interface (not released with .NET 6) - dotnet/sdk#23073

Before you start ☕

DotNet7Demos is a console application and DotNet7DemosWeb is a web api project. Web api project contains the demos for Rate limiting middleware and Infer API controller action parameters that come from services. Other demos are contained within the console application. Please check Program.cs

If you want to run the Rate limiting middleware test (in concurrency-users-test.js), install k6 from the link in the prerequisites section and execute following command in the directory.

k6 run .\concurrency-users-test.js

Additional 💢

Breaking changes in .NET 7 - https://docs.microsoft.com/en-us/dotnet/core/compatibility/7.0#aspnet-core