How to Access Non-Assembly-Specific Configuration Files in .NET?

Working with Configuration Files Outside of Assemblies in .NET

.NET applications typically use ConfigurationManager.OpenExe(exePath) to access configuration files linked to specific assemblies. But what if your config file isn't directly associated with an assembly?

The solution lies in using the ExeConfigurationFileMap class. This allows you to create a direct link between your application and an external configuration file. Here's how:

ExeConfigurationFileMap configMap = new ExeConfigurationFileMap();
configMap.ExeConfigFilename = @"d:\test\justAConfigFile.config.whateverYouLikeExtension";
Configuration config = ConfigurationManager.OpenMappedExeConfiguration(configMap, ConfigurationUserLevel.None);

ExeConfigFilename specifies the complete path to your configuration file. ConfigurationUserLevel.None ensures the configuration applies to all users.

Accessing settings is straightforward:

config.AppSettings.Settings["test"].Value;

This retrieves the value associated with the "test" key within the AppSettings section of your specified configuration file.

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