How to show slide show Powrpoint example.pptx on asp.net in C#?

[ibalta]

Microsoft.Office.Interop.PowerPoint.Application oPPT;
            Microsoft.Office.Interop.PowerPoint.Presentations objPresSet;
            Microsoft.Office.Interop.PowerPoint.Presentation objPres;
 
            //the location of your powerpoint presentation
 
            //string strPres = @"filepath";
            tablo = AraBaglantı.sorgula("select DersKonumu from Ders where DersID=" + DropDersAdi.SelectedItem.Value + "");
 
            string strPres = Server.MapPath("~/DOSYA/" + tablo.Rows[0][0].ToString());
 
            //Create an instance of PowerPoint.
            oPPT = ApplicationClass();
 
            // Show PowerPoint to the user.
            oPPT.Visible = Microsoft.Office.Core.MsoTriState.msoTrue;
 
            objPresSet = oPPT.Presentations;
 
            //open the presentation
            objPres = objPresSet.Open(strPres, Microsoft.Office.Core.MsoTriState.msoFalse,
            MsoTriState.msoTrue, Microsoft.Office.Core.MsoTriState.msoTrue);
 
            objPres.SlideShowSettings.Run();