class ChangePixelFormatToBlackAndWhiteCommandExample
{
    public void ProcessImage()
    {
        // [ do not forget to set your image file path here! ]
        // create an image collection
        using (Vintasoft.Imaging.ImageCollection images = new Vintasoft.Imaging.ImageCollection())
        {
            // add image to the image collection
            images.Add("Flower.jpg");
            try
            {
                // create the image processing command
                Vintasoft.Imaging.ImageProcessing.ChangePixelFormatToBlackWhiteCommand command =
                    new Vintasoft.Imaging.ImageProcessing.ChangePixelFormatToBlackWhiteCommand(500);
            
                // subscribe to progress event of image processing command
                command.Progress +=
                    new System.EventHandler<Vintasoft.Imaging.ImageProcessing.ImageProcessingProgressEventArgs>(command_Progress);
            
                try
                {
                    // for each image in image collection
                    foreach (Vintasoft.Imaging.VintasoftImage image in images)
                    {
                        // apply the image processing command to the image
                        command.ExecuteInPlace(image);
                    }
                }
                catch (Vintasoft.Imaging.ImageProcessing.ImageProcessingException ex)
                {
                    // show error message
                    System.Windows.Forms.MessageBox.Show(ex.Message);
                    return;
                }
            
                // save the processed image collection to a new TIFF file
                images.SaveSync("processed-image.tif");
            }
            finally
            {
                images.ClearAndDisposeItems();
            }
        }
    }
            
    void command_Progress(object sender, Vintasoft.Imaging.ImageProcessing.ImageProcessingProgressEventArgs e)
    {
        // update progress info using e.Progress property
        // ...
            
        // cancel execution of command using e.Cancel property if necessary
        // ...
    }
}