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POListBox throwing ArgumentOutOfRangeException when adding to DataSource
 

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    <p>I'm trying use a <code>BindingList</code> as a <code>DataSource</code> for a <code>ListBox</code> in C# WinForms, but whenever I try to add items to the <code>BindingList</code>, I get an <code>ArgumentOutOfRangeException</code> thrown. The following code demonstrates the problem (assume a form with <code>ListBox listBox1</code>):</p> <pre><code>BindingList&lt;string&gt; dataSource = new BindingList&lt;string&gt;(); listBox1.DataSource = dataSource; dataSource.Add("Test1"); // Exception, here. </code></pre> <p>Note that if <code>dataSource</code> already has items in it, I do not get the exception:</p> <pre><code>BindingList&lt;string&gt; dataSource = new BindingList&lt;string&gt;(); dataSource.Add("Test1"); listBox1.DataSource = dataSource; dataSource.Add("Test2"); // Appears to work correctly. </code></pre> <p>I can work around the problem by setting the <code>DataSource</code> property to <code>null</code> before adding an item, and re-setting the <code>DataSource</code> afterward, but this feels like a hack, and I'd like to be able to avoid doing so.</p> <p>Is there a (non-hack) way to use an empty <code>DataSource</code> on a <code>ListBox</code>, such that adding items to it doesn't throw exceptions?</p> <p><strong>Edit</strong>: Stack Trace:</p> <blockquote> <p>System.Windows.Forms.dll!System.Windows.Forms.ListBox.SelectedIndex.set(int value) + 0x1ec bytes<br> System.Windows.Forms.dll!System.Windows.Forms.ListControl.DataManager_PositionChanged(object sender, System.EventArgs e) + 0x2e bytes<br> System.Windows.Forms.dll!System.Windows.Forms.CurrencyManager.OnPositionChanged(System.EventArgs e) + 0x39 bytes<br> System.Windows.Forms.dll!System.Windows.Forms.CurrencyManager.ChangeRecordState(int newPosition, bool validating, bool endCurrentEdit, bool firePositionChange, bool pullData) + 0x14f bytes<br> System.Windows.Forms.dll!System.Windows.Forms.CurrencyManager.List_ListChanged(object sender, System.ComponentModel.ListChangedEventArgs e) + 0x2e4 bytes<br> System.dll!System.ComponentModel.BindingList.OnListChanged(System.ComponentModel.ListChangedEventArgs e) + 0x17 bytes<br> System.dll!System.ComponentModel.BindingList.FireListChanged(System.ComponentModel.ListChangedType type, int index) + 0x35 bytes<br> System.dll!System.ComponentModel.BindingList.InsertItem(int index, System._<em>Canon item) + 0x3f bytes<br> mscorlib.dll!System.Collections.ObjectModel.Collection.Add(System.</em>_Canon item) + 0x76 bytes</p> </blockquote>
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    1. CONo repro, post the stack trace of the exception.
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    2. COI'm feeling kinda stupid--it's an exception that .Net handles internally; my debugger was just set to trigger on all thrown exceptions. Next time, I'll be sure to "Continue" until I get an actual crash.
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