Parsen von PPTX-Formaten in C#

//Extract Text from the Whole pptx Presentation 
    Presentation pptxPresentation = new Presentation(dataDir + "demo.pptx");
    
    //Get an Array of ITextFrame objects from all slides in the PPTX
    ITextFrame[] textFramesPPTX = Aspose.Slides.Util.SlideUtil.GetAllTextFrames(pptxPresentation, true);
    
    //Loop through the Array of TextFrames
     for (int i = 0; i < textFramesPPTX.Length; i++)
    
        //Loop through paragraphs in current ITextFrame
        foreach (IParagraph para in textFramesPPTX[i].Paragraphs)
    
             //Loop through portions in the current IParagraph
             foreach (IPortion port in para.Portions)
             {
                //Display text in the current portion
                Console.WriteLine(port.Text);
    
                //Display font height of the text
                Console.WriteLine(port.PortionFormat.FontHeight);
    
                //Display font name of the text
                if (port.PortionFormat.LatinFont != null)
                   Console.WriteLine(port.PortionFormat.LatinFont.FontName);
            }