ConfigurationManager not found

Question

I am new to VS 3.5 and I am writing a console app that needs to pull some key values from the app.config file.

I have:

Imports System.Configuration 

and I am trying to reference ConfigurationManager.AppSettings but this generates an error:

Name ConfigurationManager is not declared

What am I missing?

Buckish

Answer 1

Make sure you have a reference to the assembly System.Configuration.dll

Elisa

Yes, thank you for responding. I did eventually figure that on my own! – Buckish

Answer 2

Project -> Add References -> .NET -> select System.Configuration

Congratulation

Answer 3

I had to Install NuGet package System.Configuration.ConfigurationManager in my Visual Studio 2019 C# project.

E.g.,

Install-Package System.Configuration.ConfigurationManager -Version 4.7.0

Horsewhip

This is the correct way to go for newer Visual Studio installations. – Surefooted

I've just opened a .NET Framework 4.7.2 console app project in Visual Studio 2022 and it seems to recognise ConfigurationManager with just a reference to System.Configuration. The project has no NuGet packages at all. It compiles without error or warnings. – Aerophone

Answer 4

I had this problem myself and actually included the reference to System.Configuration, and it STILL wouldn't show up.

I had to go to the Build menu, select Clean, and then rebuild.

Posting because in six months when I see this again I'll probably forget what I did...

Geist

I done this , but not worked . So, closed project and then reopen project. worked fine. – Munich

Answer 5

Try using System.Configuration;
OR
Try to add reference by selecting
Project -> Add References -> .NET -> select System.Configuration

now you can use "ConfigurationManager"

Immunity

Answer 6

Add the reference to System.Configuration:

Menu Bar -> Project -> Add Reference... -> .NET (Tab) -> System.Configuration -> OK

Thorianite