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    <p>If you don't mind hacking around the framework and you can reasonably assume the .net framework version the application is running on (i.e. it's a web application or an intranet application) then you could try something like this:</p> <pre><code>using System; using System.Collections.Specialized; using System.Configuration; using System.Configuration.Internal; using System.Reflection; static class ConfigOverrideTest { sealed class ConfigProxy:IInternalConfigSystem { readonly IInternalConfigSystem baseconf; public ConfigProxy(IInternalConfigSystem baseconf) { this.baseconf = baseconf; } object appsettings; public object GetSection(string configKey) { if(configKey == "appSettings" &amp;&amp; this.appsettings != null) return this.appsettings; object o = baseconf.GetSection(configKey); if(configKey == "appSettings" &amp;&amp; o is NameValueCollection) { // create a new collection because the underlying collection is read-only var cfg = new NameValueCollection((NameValueCollection)o); // add or replace your settings cfg["test"] = "Hello world"; o = this.appsettings = cfg; } return o; } public void RefreshConfig(string sectionName) { if(sectionName == "appSettings") appsettings = null; baseconf.RefreshConfig(sectionName); } public bool SupportsUserConfig { get { return baseconf.SupportsUserConfig; } } } static void Main() { // initialize the ConfigurationManager object o = ConfigurationManager.AppSettings; // hack your proxy IInternalConfigSystem into the ConfigurationManager FieldInfo s_configSystem = typeof(ConfigurationManager).GetField("s_configSystem", BindingFlags.Static | BindingFlags.NonPublic); s_configSystem.SetValue(null, new ConfigProxy((IInternalConfigSystem)s_configSystem.GetValue(null))); // test it Console.WriteLine(ConfigurationManager.AppSettings["test"] == "Hello world" ? "Success!" : "Failure!"); } } </code></pre>
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A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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