For .NET Core 3.0, we’re shipping a brand new namespace called System.Text.Json with support for a reader/writer, a document object model (DOM), and a serializer. In this blog post, I’m telling you why we built it, how it works, and how you can try it. 

Here’s the list of what’s new in this preview:

• New Razor features: @attribute, @code, @key, @namespace, markup in @functions
• Blazor directive attributes
• Authentication & authorization support for Blazor apps
• Static assets in Razor class libraries
• Json.NET no longer referenced in project templates
• Certificate and Kerberos Authentication
• SignalR Auto-reconnect
• Managed gRPC Client
• gRPC Client Factory
• gRPC Interceptors 

Creating your first gRPC .NET Core Client and Server App using Visual Studio or Visual Studio Code 

Evaluating Performance of REST vs. gRPC 

Working with gRPC in ASP.NET Core 

C# and gRPC Part One 

gRPC Bi-directional streaming with Razor Pages and a Hosted Service gRPC client 

An Early Look at gRPC and ASP.NET Core 3.0  

An authorization library that supports access control models like ACL, RBAC, ABAC in C#