How to setup and read appsettings when creating a project in Visual Code?

Question

I started using Visual Code instead of VS- Unfortunately, I can't figure out how to setup appSettings.config and reference the key values using Configuration Manager.

This line throws a Nullreference exception:

var applicationId = ConfigurationManager.AppSettings["appId"].ToString();

I manually added the file appSettings.config when I created the console application. Here's the Folder structure:

Is there additional configuration needed?

There's no appsettings.config in .NET. In .NET Framework settings are stored in app.config and accessed through ConfigurationManager or Properties.Settings. The weekly typed AppSetting is a remnant of .NET Framework 1, way back in 2002. Newer versions use strongly typed ApplicationSettings that can be edited using a VS GUI designer, accessible through Properties.Settings. — Panagiotis Kanavos
– Panagiotis Kanavos, Commented Mar 7, 2024 at 10:53
.NET Core (which includes .NET 5 and later) doesn't use any of this. There isn't even a ConfigurationManager any more. They use a far more powerful and easier Configuration Middleware, with appsettings.json just one of the sources. — Panagiotis Kanavos
– Panagiotis Kanavos, Commented Mar 7, 2024 at 10:54
If you use Visual Studio Code you're probably using .NET Core, in which case you shouldn't use ConfigurationManager at all. Libraries and NuGet packages work expect settings through the Configuration middleware. — Panagiotis Kanavos
– Panagiotis Kanavos, Commented Mar 7, 2024 at 10:56

Chaka · Accepted Answer · 2024-03-07 14:11:21Z

0

I needed to rename appsettings.config to app.config.

answered Mar 7, 2024 at 14:11

Chaka

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