C3248:'System::IO::Stream::Dispose': function declared as '__sealed' cannot be overridden by 'MPS::SerialPort::SerialPort::Dispose'

Question

I get this error when I migrated a vc++ project in VS 2003 to VS 2010. Project uses /clr:oldsyntax.

 

The class 'MPS::SerialPort::SerialPort::Dispose' re-defines the Dispose() as below

void SerialPort::Dispose()

{

m_WaitHandle->Close();

if( m_gchBuffer.IsAllocated )

m_gchBuffer.Free();

}

 

please suggest what can be done to ovecome the error.