The fact that you have updated your Visual Studio version to 2010 should not have in common with the error that you get. However, at the time you have updated to VS 2010 you have probably updated your Telerik WinForms version to the latest one. Please note that in Q3 2011 we removed several controls that had been obsolete for more than a year. One of them is RadListBox. Here you can see how you can update to its up-to-date counterpart RadListControl.
I hope this helps.
the Telerik team