DeviceManager manager = new DeviceManagerClass();
Device device = null;
foreach (DeviceInfo info in manager.DeviceInfos)
{
if (info.Type != WiaDeviceType.ScannerDeviceType) continue;
device = info.Connect();
break;
}

CommonDialogClass cdc = new WIA.CommonDialogClass();
Items items = cdc.ShowSelectItems(device, WiaImageIntent.UnspecifiedIntent, WiaImageBias.MaximizeQuality, false, true, false);
MessageBox.Show(items.Count.ToString());

foreach (Item item in items)
{

CommonDialogClass cdcTemp = new WIA.CommonDialogClass();
ImageFile imageFile = cdcTemp.ShowTransfer(item,
"{B96B3CAB-0728-11D3-9D7B-0000F81EF32E}",
true) as ImageFile;
if (imageFile != null)
{
var buffer = imageFile.FileData.get_BinaryData() as byte[];
using (MemoryStream ms = new MemoryStream())
{
ms.Write(buffer, 0, buffer.Length);
pictureBox1.Image = Image.FromStream(ms);
pictureBox1.SizeMode = System.Windows.Forms.PictureBoxSizeMode.Zoom;
}
}

}