How Can I Load Custom Configuration Files Outside the .NET Assembly Context?

Load custom configuration files outside of .NET assembly context

Many .NET applications often need to access configuration files that are not directly associated with any assembly. While ConfigurationManager.OpenExe(exePath) allows loading configuration files bound to an assembly, it may not suit your needs if your configuration file exists independently.

Solution

To solve this situation, the solution lies in leveraging the ExeConfigurationFileMap class:

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

This allows you to map custom configuration file paths to the configuration manager. Once this configuration is loaded, you can access specific values ​​using the index operator:

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

By taking this approach, you can seamlessly load and manipulate custom configuration files that are not tied to any specific assembly, increasing the flexibility of your application.

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