Merge Word Files into One Document in C#

Wordize for .NET is a professional solution for automating Word document merging within enterprise document workflows. The Merger class enables C# developers to programmatically combine Word files for report preparation, documentation creation, and legal transaction support.

Key Features:

The Merge() method combines multiple Word documents into a single file with automatic format detection based on file extensions
Precise formatting control during Word merging with three main modes: complete style merging of all Word documents, preserving original formatting of each source, or maintaining exact layout and page structure without changes
Export capability of Word merge results to graphic format - the MergeToImages() method returns merge results as an array of images
Fluent API support for launching Word merge operations through MergerContext and method chaining, enhancing C# code clarity

Use Cases:

Combine individual sections, chapters, or modules into unified reports and technical documents for convenient distribution
Merge Word files from different departments or project participants into unified presentations
Create consolidated archives from related Word documents for storage system optimization
Combine related Word documents, appendices, and supplements into unified packages
Merge Word content from various sources to create catalogs and reference materials

Test the capabilities of programmatic Word document merging using the interactive online demo presented on this page. Upload multiple Word files, specify their merge parameters, execute the operation, and download the consolidated document for review. The provided C# code snippet is fully ready for use in your .NET project.

Run code

Upload the first document

Upload other documents

Select output format from the list

using Wordize.Merging;

Merger.Merge("Output.docx", 
    [
        "Input1.docx", 
        "Input2.docx" 
    ]);
                            using Wordize.Merging;

Merger.Merge("{{output}}", 
    [
        "{{input1}}", 
        "{{input2}}" 
    ]);
                            using Wordize.Merging;
using Wordize.Saving;

var imageStreams = Merger.MergeToImages(
    ["{{input1}}", "{{input2}}"],
    new ImageSaveOptions(SaveFormat.{{saveFormat}}) { PageLayout = MultiPageLayout.Vertical(10) },
    MergeFormatMode.KeepSourceFormatting
);

using var file = File.Create($"{{output}}");
imageStreams[0].Position = 0;
imageStreams[0].CopyTo(file);
                            using Wordize.Merging;
using Wordize.Saving;

ImageSaveOptions saveOptions = new ImageSaveOptions(SaveFormat.{{saveFormat}});
saveOptions.PageLayout = MultiPageLayout.Vertical(10);

Merger.Create()
        .From("{{input1}}")
        .From("{{input2}}")
        .To("{{output}}", saveOptions)
        .Execute();
                            using Wordize.Merging;

Merger.Create()
        .From("{{input1}}")
        .From("{{input2}}")
        .To("{{output}}", SaveFormat.{{saveFormat}})
        .Execute();
            

                        Run code
			    

How to merge multiple Word files in C#

1

Connect Wordize for .NET to programming project

Connect Wordize SDK to your .NET project
2

Programmatically merge Word files in C#

Call the Merge() method, specifying the output file name and collection of input Word files in parameters
3

Get Word file merge result

Get the merged Word file