Created Unassigned: A first chance exception of type 'System.ArgumentException' occurred in System.Windows.dll Additional information: The parameter is incorrect. [12028]

How can I resolve this exception?
A first chance exception of type 'System.ArgumentException' occurred in System.Windows.dll
Additional information: The parameter is incorrect.
OR
"System.Windows.pdb not loaded"... ???

Please any one tell me if its possible...