How to modify existing equation using LaTeX in .NET Core Word document using C#?

Syncfusion Essential DocIO is a .NET Core Word Library used to create, read, edit, and convert Word documents programmatically without Microsoft Word or interop dependencies. Using this library, you can modify existing equation using LaTeX in a Word document using C#.

Steps to modify existing equation using LaTeX in a Word document using C#

1. Create a new C# Console application project.
2. Install the Syncfusion.DocIO.Net.Core NuGet package as a reference to your project from Nuget.org.
   
   

3. Include the following namespace in the Program.cs file​.
   C#

using Syncfusion.DocIO;
using Syncfusion.DocIO.DLS;

4. Use the following code snippet to modify existing equation using LaTeX in a Word document.
   C#

//Open a Word document using File stream.
using (FileStream inputStream = new FileStream("../../../Input.docx", FileMode.Open, FileAccess.Read))
{
   // OPen the existing Word document.
   using (WordDocument document = new WordDocument(inputStream, FormatType.Docx))
   {
       // Access the first paragraph from the last section of the document
       WParagraph paragraph = document.LastSection.Body.ChildEntities[2] as WParagraph;

       // Retrieve the first math equation in the paragraph, if it exists
       WMath math = paragraph.ChildEntities[0] as WMath;
       if (math != null)
       {
           // Get the LaTeX representation of the math equation
           string laTeX = math.MathParagraph.LaTeX;
           // Replace occurrences of 'a' with 's' in the LaTeX representation
           laTeX = laTeX.Replace("x", "k");
           //Modify the LaTeX string
           math.MathParagraph.LaTeX = laTeX;
       }
       using (FileStream outputStream = new FileStream(@"../../../Result.docx", FileMode.Create, FileAccess.Write))
       {
           document.Save(outputStream, FormatType.Docx);
       }
   }
}

You can download a complete working sample of modify existing equation using LaTeX in a Word document from GitHub.

By executing the program, you will get the Word document as follows.

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

Conclusion
I hope you enjoyed learning about how to modify existing equation using LaTeX in a Word document using .NET Core Word Library.

You can refer to our ASP.NET Core DocIO feature tour page to know about its other groundbreaking feature representations and documentation, and how to quickly get started for configuration specifications. You can also explore our ASP.NET Core DocIO example to understand how to create and manipulate data.

For current customers, you can check out our components from the License and Downloads page. If you are new to Syncfusion, you can try our 30-day free trial to check out our other controls.

If you have any queries or require clarifications, please let us know in the comments section below. You can also contact us through our support forums, Direct-Trac, or feedback portal. We are always happy to assist you!