{
  "id": 19804920,
  "title": "Merging PDF and DOCX in .NET: The Proper In-Memory Approach Without MS Office or Temporary Files",
  "url": "https://urgent.news/2026/11/13/merging-pdf-and-docx-in-net-the-proper-in-memory-approach-without-ms",
  "topic": "tech",
  "section": "Tech",
  "published": "2026-11-13T12:31:07.000Z",
  "source": {
    "name": "Dev.to",
    "slug": "dev-to",
    "url": "https://dev.to/sautinsoft/merging-pdf-and-docx-in-net-the-proper-in-memory-approach-without-ms-office-or-temporary-files-1n1l"
  },
  "original_language": "en",
  "account": null,
  "summary": "In the business world, generating a single final report that combines various sources such as dynamic cover pages, analytics in PDF format, and static legal appendices can be a complex task. Traditional approaches in .NET often involve using Microsoft Office Interop, creating temporary files, or simply concatenating byte arrays, leading to memory leaks, I/O bottlenecks, security risks, and corrupted files. However, a more professional and efficient method involves merging documents in-memory using a unified Document Object Model (DOM). This article provides a step-by-step guide on how to achieve this using the Document .Net library by SautinSoft in C#. The first step involves preparing the source documents as byte arrays, which are then loaded into a master document without creating any files on disk. The second step addresses font issues that may arise when loading PDFs on Linux servers, ensuring the document layout remains intact.",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}