internal static IntPtr SCardFreeMemory(
     [In] IntPtr hContext,
     [In] IntPtr pvMem)
 {
     if (_osUnixPlatform == OSUnixPlatform.Linux)
     {
         return(LinuxNativeMethods.SCardFreeMemory(hContext, pvMem));
     }
     else if (_osUnixPlatform == OSUnixPlatform.OSX)
     {
         return(OSXNativeMethods.SCardFreeMemory(hContext, pvMem));
     }
     else
     {
         throw new NotImplementedException();
     }
 }