using System;

// Add Microsoft Library in order to deal with Microsoft Office documents such as PPT.
using Microsoft.Office.Core;
using PowerPoint = Microsoft.Office.Interop.PowerPoint;

namespace Migration
{
     class Program
    {
        static void Main(string[]args)
        {
            //Declartion Part
            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:\Migration_ppt.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);

            // This part is converting the stations' info. to a text file and orgnizing the info. in the required style.
            string[] ouput = presentation_text.Split('\r');
            System.IO.File.WriteAllLines(@"C:\DataMigrationTextFile.txt", ouput);
        }
    }
}