https://devblogs.microsoft.com/dotnet/check-out-csharp-12-preview/
ASP.NET Core updates in .NET 8 Preview 3
Announcing .NET 8 Preview 3

https://devblogs.microsoft.com/dotnet/check-out-csharp-12-preview/
ASP.NET Core updates in .NET 8 Preview 3
Announcing .NET 8 Preview 3

Ну и как же без Get started with OpenAI in .NET

How can I access OpenAI models
Access to models like GPT is available via REST APIs and libraries.

Additionally, Azure OpenAI Service provides Azure customers with access to OpenAI’s advanced language AI models such as OpenAI GPT-4 with the security and enterprise promise of Microsoft Azure.

The APIs are co-developed with OpenAI to ensure compatibility and a smooth transition between the two. Customers also benefit from private networking, regional availability, and responsible AI content filtering.