how to pull layers out of the PSD file and save them into separate files?

// Create advanced PSD reader object to work with the PSD file.
Aurigma.GraphicsMill.Codecs.AdvancedPsdReader psdReader = 
	new Aurigma.GraphicsMill.Codecs.AdvancedPsdReader();

// Create the bitmap object which will store the image extracted from layers.
Aurigma.GraphicsMill.Bitmap bitmap = new Aurigma.GraphicsMill.Bitmap();

// Open advanced PSD reader to be able to get layers.
psdReader.Open(@"C:\Temp\WorkingWithLayers.psd");

// Within each frame in reader check out that it is not unknown.
foreach (Aurigma.GraphicsMill.Codecs.AdvancedPsdFrame frame in psdReader)
{
	// Skip if the layer type is unknown.
	if (frame.Type != Aurigma.GraphicsMill.Codecs.PsdFrameType.Unknown)
	{
		// Extract the image from the layer.
		frame.GetBitmap(bitmap);
		
		// Save layer image in PNG format.
		bitmap.Save(@"C:\Temp\" + "frame_" + frame.Index + ".png");
	}
}
// Clean up.
psdReader.Close();