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How to edit Word document in C#, VB.NET

2 mins read

Syncfusion Essential DocIO is a .NET Word library used to create, read, and edit Word documents programmatically without Microsoft Word or interop dependencies. Using this library, you can edit a Word document in C# and VB.NET.

Steps to edit Word document programmatically in C#:

  1. Create a new C# console application project.

Create Console application in Visual Studio

  1. Install Syncfusion.DocIO.WinForms NuGet package as a reference to your .NET Framework applications from the

Add DocIO NuGet package reference to the project

  1. Include the following namespace in the Program.cs file.


using Syncfusion.DocIO.DLS;


Imports Syncfusion.DocIO.DLS
  1. Use the following code snippet to edit Word document with simple text.


//Opens the template Word document.
using (WordDocument document = new WordDocument(@"../../Template.docx"))
    //Gets the text body of first section.
    WTextBody textBody = document.Sections[0].Body;
    //Gets the first paragraph.
    WParagraph paragraph = textBody.Paragraphs[0];
    //Gets the text range and modifies its content.
    WTextRange textRange = paragraph.ChildEntities[0] as WTextRange;
    textRange.Text = "Syncfusion Word library (Essential DocIO)";
    //Sets formatting for modified content.
     textRange.CharacterFormat.FontSize = 20;
    textRange.CharacterFormat.Bold = true;
    //Saves the Word document.


'Opens the template Word document.
Using document As WordDocument = New WordDocument("../../Template.docx")
    'Gets the text body of first section.
    Dim textBody As WTextBody = document.Sections(0).Body
    'Gets the first paragraph.
    Dim paragraph As WParagraph = textBody.Paragraphs(0)
    'Gets the text range and modifies its content.
    Dim textRange As WTextRange = TryCast(paragraph.ChildEntities(0), WTextRange)
    textRange.Text = "Syncfusion Word library (Essential DocIO)"
     //Sets formatting for modified content.
    textRange.CharacterFormat.FontSize = 20
    textRange.CharacterFormat.Bold = True
    'Saves the Word document.
End Using

A complete working example to edit Word document using C# can be downloaded from

By executing the application, you will get the output Word document as follows. Edited Word document in C# using DocIO

Take a moment to peruse the documentation, where you can find basic Word document processing options along with features like mail merge, merge and split documents, find and replace text in the Word document, protect the Word documents, and most importantly PDF and Image conversions with code examples.

Explore more about the rich set of Syncfusion Word Framework features.

An online example to edit Word document.

See Also:

Create Word document in Windows Forms

Create Word document in WPF

Create Word document in ASP.NET Core

Create Word document in ASP.NET MVC

Create Word document in Xamarin

Create Word document in Xamarin.Android


Starting with v16.2.0.x, if you reference Syncfusion assemblies from trial setup or from the NuGet feed, include a license key in your projects. Refer to link to learn about generating and registering Syncfusion license key in your application to use the components without trail message.


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