RCEU_PDFWorkflowManager/PDFWorkflowManager/PDFWorkflowManager/PdfService.cs

using System.Diagnostics;

namespace PDFWorkflowManager
{
    public static class PdfService
    {
        public static void MergePdfs(string pdfToolkitPath, string inputPattern, string bannerPage, string outputFile)
        {
            var startInfo = new ProcessStartInfo
            {
                FileName = pdfToolkitPath,
                Arguments = $"\"{inputPattern}\" {bannerPage} cat output \"{outputFile}\"",
                UseShellExecute = false,
                RedirectStandardOutput = true,
                CreateNoWindow = true
            };
            using (var process = Process.Start(startInfo))
            {
                process.WaitForExit();
            }
        }

        public static void UpdatePdfMetadata(string ghostScriptPath, string tempFile, string metadataFile, string outputFile)
        {
            var startInfo = new ProcessStartInfo
            {
                FileName = ghostScriptPath,
                Arguments = $"-dBATCH -dNOPAUSE -dAutoRotatePages=/None -sDEVICE=pdfwrite -sOutputFile=\"{outputFile}\" \"{tempFile}\" \"{metadataFile}\"",
                UseShellExecute = false,
                RedirectStandardOutput = true,
                CreateNoWindow = true
            };
            using (var process = Process.Start(startInfo))
            {
                process.WaitForExit(120000);
            }
        }
    }
}