PS a BMP

    // create a stream for input PS file
    using (var psStream = new System.IO.FileStream("template.PS", System.IO.FileMode.Create, System.IO.FileAccess.Read))
    {
        // create a stream for output BMP file
        using (var pdfStream = System.IO.File.Open("output.gif", System.IO.FileMode.Open, System.IO.FileAccess.Write))
        {
            // load the PS file from stream
            var document = new Aspose.Page.PS.PsDocument(psStream);
            // create an instance of ImageSaveOptions
            var options = new Aspose.Page.PS.Device.ImageSaveOptions();
            // create rendering device for BMP
            var device = new Aspose.Page.PS.Device.ImageDevice(System.Drawing.Imaging.ImageFormat.BMP);
            // save PS as BMP
            document.Save(device, options);
        }
    }