public PoolingDescriptor()
{
_desc = new cudnnPoolingDescriptor();
res = CudaDNNNativeMethods.cudnnCreatePoolingDescriptor(ref _desc);
Debug.WriteLine(String.Format("{0:G}, {1}: {2}", DateTime.Now, "cudnnCreatePoolingDescriptor", res));
if (res != cudnnStatus.Success) throw new CudaDNNException(res);
}