Why does ConfigurationManager not contain a definition for OpenExeConfiguration? C#

Question

I am sort of new to config files. I am aware that I can add key value pairs and that it's possible to access them and change them on the fly. I am attempting to implement the ChangeConfiguration method on https://blogs.msdn.microsoft.com/youssefm/2010/01/21/how-to-change-net-configuration-files-at-runtime-including-for-wcf/

However, I am getting:

"'ConfigurationManager' does not contain a definition for 'OpenExeConfiguration'"

...and I get the same for trying to use ConfigurationManager.RefreshSection()

I am aware that the instructions date back to 2010 so by the looks of it, these instructions seem to no longer be the correct procedure to do this...?

Context

Web UI tests using Specflow, Selenium WebDriver, NUnit
Class Library targeting .NET Framework 4.6.1
Trying to add key value pairs at runtime in App.config

using System.Configuration; using System.Reflection;

namespace CoreSeleniumFramework.Managers
{
    public class ConfigurationManager
    {
        static void ChangeConfiguration()
        {
            Configuration config = ConfigurationManager.OpenExeConfiguration(Assembly.GetEntryAssembly().Location);
            AppSettingsSection appSettings = (AppSettingsSection)config.GetSection("appSettings");
            appSettings.Settings.Clear();
            appSettings.Settings.Add("name", "bar");
            config.Save();
            ConfigurationManager.RefreshSection("appSettings");
        }
    }
}

did you use like this system.configuration.configurationmanager.openexeconfiguration? did you add using system.configuration? — Nastaran Hakimi
@NastaranHakimi I added the code to the main question, thanks — Zuno
I am not sure but what if you insert system.configuration.configurationmanager.openexeconfiguration instead of ConfigurationManager.OpenExeConfiguration — Nastaran Hakimi
I know it is about appsettings but maybe helps you stackoverflow.com/questions/53414794/… — Nastaran Hakimi
Follow the link may help you docs.microsoft.com/en-us/dotnet/api/… — LDS

Zuno Zuno · Accepted Answer · 2019-12-07T17:23:52

Answered by @Nastaran Hakimi

Ok so this is a thing... need to use...

System.Configuration.ConfigurationManager.OpenExeConfiguration

...when it seems I should just need...

using System.Configuration;

Edit: if you get "object reference not set to an instance of an object" (or in other words, GetEntryAssembly() returns null), use GetCallingAssembly()

Why does ConfigurationManager not contain a definition for OpenExeConfiguration? C#

Context

1 Answers