Program.cs

using Ghostscript.NET;
using Ghostscript.NET.Processor;
using System.Diagnostics;

namespace GhostExtract
{
    internal class Program
    {
        static void Main(string[] args)
        {
            // https://github.com/ArtifexSoftware/Ghostscript.NET/issues/107
            string outputText = null;
            string strFullnameOutput = Path.Combine(Environment.CurrentDirectory, "input.pdf");

            // Ensure the Ghostscript DLL is accessible (gsdll64.dll or gsdll32.dll)
            GhostscriptVersionInfo gsv = GhostscriptVersionInfo.GetLastInstalledVersion();

            List<string> switches = new List<string>();
            switches.Add("-empty");
            switches.Add("-dQUIET");
            switches.Add("-dNOSAFER");
            switches.Add("-dBATCH");
            switches.Add("-dNOPAUSE");
            switches.Add("-sDEVICE=txtwrite");
            switches.Add($"-sOutputFile={outputText}");
            switches.Add(strFullnameOutput);

            try
            {
                using (GhostscriptProcessor processor = new GhostscriptProcessor(gsv))
                {
                    processor.StartProcessing(switches.ToArray(), null);
                }
            }
            catch (Exception ex)
            {
                Debug.Write(ex.Message);
            }
        }
    }
}