C#

IDataReader myReader = cmd.ExecuteReader(CommandBehavior.SequentialAccess);

if (myReader != null)
{
    myReader.Read();

    long size = myReader.GetBytes(0, 0, null, 0, 0);
    byte[] buffer = new byte[size];

    int bufferSize = 255;
    int dataIndex = 0;
    long bytesRead = 0;
    SetProgBar(Convert.ToInt32(size));

    while ((bytesRead < size) && ((size - bytesRead) > 255))
    {
        if (bwLoadPicture.CancellationPending)
        {
            e.Cancel = true;
            SetLabelDownload("Picture download cancelled.");
        }
        else
        {
            bytesRead += myReader.GetBytes(0, dataIndex, buffer, dataIndex, bufferSize);
            dataIndex += 255;

            bwLoadPicture.ReportProgress(255);
            decimal FileSize = (Convert.ToDecimal(size) / 1024) / 1024;
            decimal CurrentSize = (Convert.ToDecimal(bytesRead) / 1024) / 1024;

            SetLabelDownload(String.Format("Downloading.. {0}MB of {1}MB", Math.Round(CurrentSize, 2).ToString(), Math.Round(FileSize, 2).ToString()));
        }
    }

    bytesRead += myReader.GetBytes(0, dataIndex, buffer, dataIndex, Convert.ToInt32((size - bytesRead)));
    SetLabelDownload("Finished Downloading.");

    MemoryStream ms = new MemoryStream(buffer);
    pictureBoxPicture.Image = Image.FromStream(ms);
    ms.Close();
}
myReader.Close();