Много подробностей и примеров из грядущего .NET Core 3
https://blogs.msdn.microsoft.com/dotnet/2019/01/29/announcing-net-core-3-preview-2/
https://blogs.msdn.microsoft.com/dotnet/2019/01/29/announcing-net-core-3-preview-2/
.NET Blog
Announcing .NET Core 3 Preview 2
Today, we are announcing .NET Core 3 Preview 2. It includes new features in .NET Core 3.0 and C# 8, in addition to the large number of new features in Preview 1. ASP.NET Core 3.0 Preview 2 is also released today.