title: C# OPC Client fails to get server list
body: <p>After I compiled my C# in my new Windows 8 64-Bit machine, I started to get the following error while getting list of available servers in my OPC client application.</p>
  
  <p>"OpcNetApi.Com
  Unable to cast COM object of type 'System.__ComObject' to interface type 'OpcRcw.Comn.IOPCServerList2'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{9DD0B56C-AD9E-43EE-8305-487F3188BF7A}' failed due to the following error: Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG))."</p>
  
  <p>What could be the reason?</p>