Cleanup.cs

 private void Cleanup(bool fromGC)
 {
     if (_disposed)
         return;

     try
     {
         // always clean up the NATIVE resources
         if (fromGC)
             return;

         // clean up managed resources ONLY if not called from GC
     }
     finally
     {
         _disposed = true;

         if (!fromGC)
             GC.SuppressFinalize(this);
     }
 }