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    <p>As the other answers say, you need to provide an XML Schema document for your custom configuration section. There's no need to add the <code>.xsd</code> schema file to some global directory; you can reference it directly from your custom section in the <code>App.config</code> file:</p> <pre><code>&lt;configuration&gt; &lt;!-- make the custom section known to .NET's configuration manager --&gt; &lt;configSections&gt; &lt;section name="customSection" type="..." /&gt; &lt;/configSections&gt; &lt;!-- your custom section --&gt; &lt;customSection xmlns="http://tempuri.org/customSection.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="customSection.xsd"&gt; ... &lt;/customSection&gt; &lt;configuration&gt; </code></pre> <p>The <code>xmlns</code> attribute is merely there to set a default namespace, so that you don't need to set it on your <code>customSection</code> element and all of its child elements. (However, do not place the <code>xmlns</code> attribute on the <code>&lt;configuration&gt;</code> element!)</p> <p>The <code>customSection.xsd</code> contains the schema that will be used by IntelliSense, for example:</p> <pre><code>&lt;xs:schema id="customSectionSchema" targetNamespace="http://tempuri.org/customSection.xsd" elementFormDefault="qualified" xmlns="http://tempuri.org/customSection.xsd" xmlns:mstns="http://tempuri.org/customSection.xsd" xmlns:xs="http://www.w3.org/2001/XMLSchema"&gt; &lt;xs:element name="customSection"&gt; ... &lt;/xs:element&gt; &lt;/xs:schema&gt; </code></pre>
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    1. POEnabling Intellisense for Custom Sections in .config Files
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    1. COWhat TYPE am I supposed to put in section.type? I guessed and put "xmlns" in there and it works...but I'm pretty sure that's wrong.
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    2. CO@Prisoner, you're supposed to put a (at least assembly-qualified) .NET type name à la `"Namespace.Class, Assembly"` there. The framework will instantiate this type and use it whenever it wants to parse the custom configuration section. Choose any of a few pre-defined section handler classes, or any custom class that implements the `IConfigurationSectionHandler` interface. For further info, google for something like `"App.config custom section handlers"`, or read an article on the topic such as [this Code Project article](http://www.codeproject.com/KB/aspnet/ConfigSections.aspx) to get started.
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Guidance
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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