MergeDocuments (.NET)

Merge multiple Word (.docx) files, update content controls and add dynamic footers using only standard .NET libraries.

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Overview

This C# console application:

• Merges multiple .docx files into a single consolidated document.
• Replaces content controls (SDTs) with supplied values.
• Adds dynamic footers for each appended document showing the filename and running page number.

Note: DOCX → PDF conversion is not included in this solution because converting DOCX to PDF requires either Microsoft Word (Interop) or a third-party library/service. I can add a PDF conversion step if allowed to use Interop or an external library.

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Prerequisites

• .NET SDK 8.0+ (or the version used in the project)

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Input

Source .docx files are kept in the Docs folder (project root).

Note: Hardcoding filesToMerge and replacements ensures simplicity, clarity, and maintainability for known files and placeholders, reducing complexity and avoiding runtime input errors, while still allowing easy updates in code if requirements change.

Source1.docx:

Source2.docx:

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How to run

Build and run:

dotnet build
dotnet run --project ./MergeDocuments

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Output

After running the application, the merged Word document will be created at: \bin\Debug\net8.0\Docs\merged.docx

Merged.docx: