I have class library written in .net standard 2.0 at visual studio 2017. Now I need to upgrade into .net standard 2.1. The problem is not able to get the .net standard 2.1.
Do I need a visual studio 2019?
As .Net Standard 2.1 represents .NET Core 3.0 or higher and .NET Core 3.0 requires Visual Studio 2019:
Yes, you need Visual Studio 2019 if you want to use Visual Studio to develop a .NET Standard 2.1 - library.