We are excited to announce the release of Spire.Presentation 7.5.3. This version adds a method called GetAllTextFrame to get text content of a slide. In addition, it fixes some known issues such as the position of the text in the text box is incorrect when converting PowerPoint to PDF. More details are listed below.

Here is a list of changes made in this release

Presentation ppt = new Presentation();
        ppt.LoadFromFile(inputFile);
foreach (ISlide slide in ppt.Slides)
{
    ArrayList arrayList = slide.GetAllTextFrame();
    foreach (String text in arrayList)
    {
        Console.Write(text);
     }
}