Recently upgrades VS 2019 to ver 16.9.4, going through tutorials, can't compile basic tutorial code, get Error BC30002 Type 'Global.System.Configuration.ApplicationSettingsBase' is not defined.

Question

I thought I'd do the VS 2019 Tutorials to get started with VS 2019. Got up to the 3rd tutorial.

went to compile the project and got the following errors.

My code is as exactly as it appears in the tutorial of the MS VS web site. So I don't think it is the code. It is the way VS is set up on my computer. This tutorial and code requires Net 5.0. But when I look at the menu item Help> About>
I see that the version of Net Framework installed is not 5.0?

I've read though the various blogs on this compile error and have not found a solution. Any thoughts please on what I may have done wrong?

Thanks Cam

Answer 1

Hi @Cameron Walker ,

Welcome to Microsoft Q&A!

I followed this tutorial to create a .NET class library and couldn’t reproduce your error. Please ensure that the tutorial prerequisites are met.

You can check the your project target framework by right-clicking on the library project > Properties.

In addition, please enter the following command at the command prompt and check the installed .NET SDK versions:
dotnet --list-sdks

Sincerely,
Anna

• If the answer is helpful, please click "Accept Answer" and upvote it.
  Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.