/// <param name="rgReaderStates">An array of SCARD_READERSTATE structures that specify the readers to watch, and that receives the result.</param>

static extern SCardFunctionReturnCodes SCardGetStatusChange(int hContext, int dwTimeout, [In, Out] SCARD_READERSTATE[] rgReaderStates, int cReaders);

  SCARD_READERSTATE[] rs = new SCARD_READERSTATE[1];

    internal static extern uint SCardGetStatusChange(IntPtr hContext, UInt32 dwTimeout, [In, Out] SCARD_READERSTATE[] rgReaderStates, UInt32 cReaders);

    internal struct SCARD_READERSTATE

SCARD_READERSTATE[] readerState = new SCARD_READERSTATE[nbReaders];

struct SCARD_READERSTATE {