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copied!<p>I'm surprised that the behaviour difference between ListBox and the Windows Explorer has not been taken care of after 4 years across 3 major updates of the .NET framework.</p> <p>I ran in to this problem back in Silverlight 3. I ended up overriding the mouse down and mouse up event handler to fully simulate the Windows Explorer behaviour.</p> <p>I don't have the source code any more but the logic should be:</p> <p><strong>When mouse down</strong></p> <ul> <li>if the target item is not selected, clear existing selection <ul> <li>if Ctrl key is down, add target item to selection</li> <li>if Shift key is down <ul> <li>if there is a previously selected item, add all items between target item and previous item to selection</li> <li>else only add target item to selection</li> </ul></li> </ul></li> <li>if the target item is selected de-select only if Ctrl key is down</li> </ul> <p><strong>When mouse up (on the same item)</strong></p> <ul> <li>if the target item is selected <ul> <li>if Ctrl key is down, remove item from selection</li> <li>if Shift key is down <ul> <li>if there is a previously selected item, remove all items between target item and previous item from selection</li> <li>else only remove target item from selection</li> </ul></li> </ul></li> </ul> <p><strong>However</strong> This should really be Microsoft's job to update the behaviour to be consistent to the operating system and to be more intuitive. I've submitted it as a bug to Microsoft if any body wants to vote for it: <a href="http://connect.microsoft.com/VisualStudio/feedback/details/809192/" rel="nofollow">http://connect.microsoft.com/VisualStudio/feedback/details/809192/</a></p>

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