Doc2Image

using Spire.Doc;
using Spire.Doc.Documents;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using static System.Net.Mime.MediaTypeNames;

namespace ConsoleApp
{
    class Program
    {
        static void Main(string[] args)
        {
            
            byte[] buffer = File.ReadAllBytes(@"C:\Users\Jefferson\Desktop\sample.doc"); //the path must be the one where the doc file to be converted is placed

            using (MemoryStream stream = new MemoryStream(buffer))
            {
                Document doc = new Document();
                doc.LoadFromStream(stream, FileFormat.Auto);
                Break pageBreak = new Break(doc, BreakType.PageBreak);
                doc.Sections[0].Paragraphs[0].ChildObjects.Insert(0, pageBreak);
                int count = doc.PageCount;
                List<byte[]> OutputImgList = new List<byte[]>();
                for (int index = 0; index < count; index++)
                {
                    Bitmap img = (Bitmap)doc.SaveToImages(index, ImageType.Bitmap);
                    ImageConverter _imageConverter = new ImageConverter();
                    if (index != 0)
                    {
                        OutputImgList.Add((byte[])_imageConverter.ConvertTo(img, typeof(byte[])));
                    }
                }

                for (int n_index = 0; n_index < OutputImgList.Count; n_index++)
                {
                    using (var ms = new MemoryStream(OutputImgList[n_index]))
                    {
                        System.Drawing.Image.FromStream(ms).Save(string.Format(@"C:\Users\Jefferson\Desktop\sample{0}.bmp", n_index)); //the path must be the one where the image files to be saved will be saved
                    }
                }
            }
        }
    }
}