EDITORIAL
See Microsoft's official website have been updated version of the .NET CORE 3.0. Find his or .NET CORE 2.1X version.
You should if you upgrade to .NET CORE 3.0 version of it?
Think
[1] First of all, we want to see their vs2019 which a release. The latest version of the official version is v16.2. However, geese, only vs2019 v16.3.10 as well as an updated version in order to use preview8.
[2] We can then go directly to the official website to download the latest review.
[3] Finally, after updating to the latest version 16.3.10, without any configuration, you can use the ASP.NET CORE 3.0 template. As shown below:
