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    <p>For Winform Controls:</p> <pre><code>/// &lt;summary&gt; /// Returns whether the function is being executed during design time in Visual Studio. /// &lt;/summary&gt; public static bool IsDesignTime(this Control control) { if (LicenseManager.UsageMode == LicenseUsageMode.Designtime) { return true; } if (control.Site != null &amp;&amp; control.Site.DesignMode) { return true; } var parent = control.Parent; while (parent != null) { if (parent.Site != null &amp;&amp; parent.Site.DesignMode) { return true; } parent = parent.Parent; } return false; } /// &lt;summary&gt; /// Sets the DropDownWidth to ensure that no item's text is cut off. /// &lt;/summary&gt; public static void SetDropDownWidth(this ComboBox comboBox) { var g = comboBox.CreateGraphics(); var font = comboBox.Font; float maxWidth = 0; foreach (var item in comboBox.Items) { maxWidth = Math.Max(maxWidth, g.MeasureString(item.ToString(), font).Width); } if (comboBox.Items.Count &gt; comboBox.MaxDropDownItems) { maxWidth += SystemInformation.VerticalScrollBarWidth; } comboBox.DropDownWidth = Math.Max(comboBox.Width, Convert.ToInt32(maxWidth)); } </code></pre> <p>IsDesignTime Usage:</p> <pre><code>public class SomeForm : Form { public SomeForm() { InitializeComponent(); if (this.IsDesignTime()) { return; } // Do something that makes the visual studio crash or hang if we're in design time, // but any other time executes just fine } } </code></pre> <p>SetDropdownWidth Usage:</p> <pre><code>ComboBox cbo = new ComboBox { Width = 50 }; cbo.Items.Add("Short"); cbo.Items.Add("A little longer"); cbo.Items.Add("Holy cow, this is a really, really long item. How in the world will it fit?"); cbo.SetDropDownWidth(); </code></pre> <p>I forgot to mention, feel free to use these on Codeplex...</p>
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    1. POWhat are your favorite extension methods for C#? (codeplex.com/extensionoverflow)
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    1. COAs mentioned, this is for WinForms only. It may work with WPF but there are issues (described in the comment about WPF at http://msdn.microsoft.com/en-us/library/system.componentmodel.component.designmode%28VS.85%29.aspx). The best solution for WPF I've found is described in http://geekswithblogs.net/lbugnion/archive/2009/09/05/detecting-design-time-mode-in-wpf-and-silverlight.aspx (though, as it's a static property, it does not really work as an extension method.)
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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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