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    copied!<p>A slightly more complicated, but far more flexible, alternative is to create a class that represents a configuration section. In your <code>app.config</code> / <code>web.config</code> file, you can have this:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8" ?&gt; &lt;configuration&gt; &lt;!-- This section must be the first section within the &lt;configuration&gt; node --&gt; &lt;configSections&gt; &lt;section name="DirectoryInfo" type="MyProjectNamespace.DirectoryInfoConfigSection, MyProjectAssemblyName" /&gt; &lt;/configSections&gt; &lt;DirectoryInfo&gt; &lt;Directory MyBaseDir="C:\MyBase" Dir1="Dir1" Dir2="Dir2" /&gt; &lt;/DirectoryInfo&gt; &lt;/configuration&gt; </code></pre> <p>Then, in your .NET code (I'll use C# in my example), you can create two classes like this:</p> <pre><code>using System; using System.Configuration; namespace MyProjectNamespace { public class DirectoryInfoConfigSection : ConfigurationSection { [ConfigurationProperty("Directory")] public DirectoryConfigElement Directory { get { return (DirectoryConfigElement)base["Directory"]; } } public class DirectoryConfigElement : ConfigurationElement { [ConfigurationProperty("MyBaseDir")] public String BaseDirectory { get { return (String)base["MyBaseDir"]; } } [ConfigurationProperty("Dir1")] public String Directory1 { get { return (String)base["Dir1"]; } } [ConfigurationProperty("Dir2")] public String Directory2 { get { return (String)base["Dir2"]; } } // You can make custom properties to combine your directory names. public String Directory1Resolved { get { return System.IO.Path.Combine(BaseDirectory, Directory1); } } } } </code></pre> <p>Finally, in your program code, you can access your <code>app.config</code> variables, using your new classes, in this manner:</p> <pre><code>DirectoryInfoConfigSection config = (DirectoryInfoConfigSection)ConfigurationManager.GetSection("DirectoryInfo"); String dir1Path = config.Directory.Directory1Resolved; // This value will equal "C:\MyBase\Dir1" </code></pre>
 

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