Where is ConfigurationManager's namespace?

Question

I've got a reference to System.Configuration - and ConfigurationSettings is found no problem - but the type or namespace 'ConfigurationManager' could not be found!?

I've read around - and it looks like it should belong to the same namespace as the ConfigurationSettings class.

EDIT: Please take note - I've clearly said I have added a reference to System.Configuration. There's been 4 comments already about this.

Crypto

You need to add reference to System.Configuration – Preserve

Version 3.5. I've added a reference - read the OP. – Crypto

Please post the code where you get that warning. Perhaps it's a syntax problem. Also look in Object Explorer under System.Configuration to see if ConfigurationManager is there. – Khania

Answer 1

ConfigurationManager is a part of the System.Configuration after .Net 2.0. Add a reference to the System.Configuration dll. Try using System.Configuration.ConfigurationManager.

Closelipped

Answer 2

You need to use the System Configuration namespace, this must be included in two ways:

1. Right click the project and choose add reference, browse "Assemblies" and tick the System.Configuration assembly.

2. Include the namespace in code:

   using System.Configuration;

Gamelan

View the properties of the reference you have added, get the location and try and browse to it. – Gamelan

using the "using System.Configuration" didn't work for me. However adding via the "right-click > add reference > assemblies > System.Configuration" solution worked for me. Thank you. – Crystacrystal

Thanks for actually including steps as to how one adds a reference. – Participial

Answer 3

You need to add a reference the System.Configuration assembly. This namespace was split across a few assemblies.

Misdirect

Answer 4

You will need to add the System.Configuration reference under the Reference folder in your project. Only adding the system.configuration with the using statement in your class is not enough.

Wheeler

The author stated: I've clearly said I have added a reference to System.Configuration. Additionally, this question is more than two years old, please answer a more current question next time. – Cuesta

Answer 5

I'm working in VisualStudio 2015, and ConfigurationManager is not present at System.Configuration namespace anymore.

I was just trying to read the App.config file...

Then I found a solution:

Get:

string str = MyProjectNamespace.Properties.Settings.Default["MySettingName"].ToString();

Set:

MyProjectNamespace.Properties.Settings.Default["MySettingName"]="myString";
MyProjectNamespace.Properties.Settings.Default.Save();

Grondin

Answer 6

I am using VS 2017, I added 'using System.Configuration' directive and also follow the step to add a reference assembly to the project but IDE still complaint configuration manager does not exist, it turn out it is due to the .net core installed by Nuget just add a empty container. The package System.Configuration.Configurationmanager 4.5.0 need to be installed as well. Start Tools -> Nuget Package Manager -> Package Manager Console and type "Install-Package System.Configuration.ConfigurationManager -Version 4.5.0" and this resolve the problem. Refer below screenshot in Object Browser in VS2017

Adames

Answer 7

For me, this problem was solved when I put the "BuildConnectionString" function in a class and added "Imports System.Configuration" at the top of the class page. I did as the Microsoft site itself says. https://learn.microsoft.com/en-us/dotnet/framework/data/adonet/connection-string-builders

Private Sub BuildConnectionString(ByVal dataSource As String, _
ByVal userName As String, ByVal userPassword As String)

' Retrieve the partial connection string named databaseConnection
' from the application's app.config or web.config file.
Dim settings As ConnectionStringSettings = _
   ConfigurationManager.ConnectionStrings("partialConnectString")

If Not settings Is Nothing Then
    ' Retrieve the partial connection string.
    Dim connectString As String = settings.ConnectionString
    Console.WriteLine("Original: {0}", connectString)

    ' Create a new SqlConnectionStringBuilder based on the
    ' partial connection string retrieved from the config file.
    Dim builder As New SqlConnectionStringBuilder(connectString)

    ' Supply the additional values.
    builder.DataSource = dataSource
    builder.UserID = userName
    builder.Password = userPassword

    Console.WriteLine("Modified: {0}", builder.ConnectionString)
End If
End Sub

The important point is to use the function in the class. When I did this the error failed to find the source.

Solan

Answer 8

Summer 2021, Visual Studio 2019 (core application). I had copied in some code with

ConfigurationManager.AppeSettings["yadayada"];

Just click the light bulb icon on the line where the problem appear and choose to instal System.Configuration Package.

Angleworm