How to Convert Word Document to Images in C#. More details and steps can be found here https://kb.aspose.com/words/net/how-to-convert-word-document-to-images-in-c-sharp/

How to Convert Word Document to Images in C#.cs

using Aspose.Words;
using Aspose.Words.Saving;
using System;

namespace KBCodeExamples
{
    class How_to_Convert_Word_Document_to_Images_in_C_sharp
    {
        public static void ConvertWordDocumenttoImages(String wordtoimage_directory)
        {
            //Set Aspose license before converting word document to images
            //using Aspose.Words for .NET
            Aspose.Words.License AsposeWordsLicense = new Aspose.Words.License();
            AsposeWordsLicense.SetLicense(wordtoimage_directory + @"Aspose.Words.lic");

            //Import the document into Aspose.Words DOM. 
            //The document can be imported from disk or memory stream.
            Document doc = new Document(wordtoimage_directory + "input.docx");

            //Set ImageSaveOptions to convert document pages to image.
            ImageSaveOptions wordpagestoimage = new ImageSaveOptions(SaveFormat.Png);

            //Set page ranges to convert all word pages to image.
            PageRange pagerange = new PageRange(0, doc.PageCount - 1);
            wordpagestoimage.PageSet = new PageSet(pagerange);
            wordpagestoimage.PageSavingCallback = new Word_Pages_To_Images();

            //Save document's pages to PNG
            doc.Save(@"output.png", wordpagestoimage);
        }

        //Implement this interface if you want to control how Aspose.Words saves separate pages
        //when saving a document to fixed page formats. 
        class Word_Pages_To_Images : IPageSavingCallback
        {
            public void PageSaving(PageSavingArgs args)
            {
                args.PageFileName = string.Format(@"output_{0}.png", args.PageIndex);
            }
        }
    }
}