c#

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

using Spire.Doc;

namespace WindowsFormsApp6
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            string text = "";
            Document document = new Document();
            document.LoadFromFile(@"C:\Users\pavle\Desktop\LoremIpsum.docx");

            foreach (Section section in document.Sections)
            {
                for (int i = 0; i < section.Paragraphs.Count; i++)
                {
                    text += section.Paragraphs[i].Text;
                }
            }

            textBox1.Text = text;
        }
    }
}