How do I Use ConfigurationBuilder in .net core 3.1 Winforms?

You extension method SetBasePath is defined in Config.FileExtensions.

Can you check if you are missing a reference to: Microsoft.Extensions.Configuration.FileExtensions package.

For resolving AddJsonFile, need to add a reference to the Microsoft.Extensions.Configuration.Json package.


I tried the same code that you have posted. I could able to compile and run the app after adding the following NuGet packages.

Microsoft.Extensions.Configuration (Version 3.1.0)
Microsoft.Extensions.Configuration.Json (Version 3.1.0)

Most probably you are missing these packages in your environment.

Tags:

C#

.Net Core