Read from Microsoft PowerPoint file ppt

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using Microsoft.Office.Core;

using PowerPoint = Microsoft.Office.Interop.PowerPoint;

namespace Naresh

{

    class Program

    {

        static void Main(string[] args)

        {

            Microsoft.Office.Interop.PowerPoint.Application PowerPoint_App = new Microsoft.Office.Interop.PowerPoint.Application();

            Microsoft.Office.Interop.PowerPoint.Presentations multi_presentations = PowerPoint_App.Presentations;

            Microsoft.Office.Interop.PowerPoint.Presentation presentation = multi_presentations.Open(@"C:\naresh\testing.pptx");

            string presentation_text = "";

            for (int i = 0; i < presentation.Slides.Count; i++)

            {

                foreach (var item in presentation.Slides[i+1].Shapes)

                {

                    var shape = (PowerPoint.Shape)item;

                    if (shape.HasTextFrame == MsoTriState.msoTrue)

                    {

                        if (shape.TextFrame.HasText == MsoTriState.msoTrue)

                        {

                            var textRange = shape.TextFrame.TextRange;

                            var text = textRange.Text;

                            presentation_text += text+" ";

                        }

                    }

                }

            }

            PowerPoint_App.Quit();

            Console.WriteLine(presentation_text);

        }

    }

}