How Can I Access External Configuration Files in .NET Without Assembly Linkage?

Loading External Configuration Files in .NET Applications

.NET applications commonly use ConfigurationManager.OpenExeConfiguration to load configuration files linked to their assemblies. However, managing external configuration files requires a different strategy.

The ExeConfigurationFileMap class provides a solution for loading configuration files independent of any assembly. This enhances flexibility and simplifies configuration management. Here's how it works:

<code class="language-csharp">ExeConfigurationFileMap configMap = new ExeConfigurationFileMap();
configMap.ExeConfigFilename = @"d:\test\justAConfigFile.config.whateverYouLikeExtension";
Configuration config = ConfigurationManager.OpenMappedExeConfiguration(configMap, ConfigurationUserLevel.None);</code>

Accessing configuration values is then simple:

<code class="language-csharp">config.AppSettings.Settings["test"].Value;</code>

This approach allows developers to easily incorporate external configuration files, improving the overall configuration process.

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