Hi Sameer Pahuja,
There was such an issue with older versions of RadControls for WinForms and it was fixed. If you experience it with Q2 2008 or later, please open a support ticket and send us a demo project. There could be some scenario that we have missed in our tests.
If the list box has less than 300 items you can set the Virtualized
property to false
. This way the hang should disappear even with Q3 2007 SP1 and there will not be any performance penalty.
the Telerik team
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