Underline annotations offer a simple way to draw attention to words, phrases, or passages in a Word DOC file. They can be useful while marking important statements in reports, highlighting terms in business documents, or providing feedback on a draft. Instead of relying on colored highlights or editing the document itself, an underline annotation keeps the marked content easy to spot while preserving the document’s existing text. This article demonstrates how to add underline annotations to DOC files using a .NET REST API. Users performing document review across various platforms can benefit from this workflow. It allows you to mark documents consistently across web, desktop, and mobile applications.

Steps to Add Underline Annotations to DOC in C# .NET

1. Install GroupDocs.Annotation Cloud SDK for .NET from NuGet
2. Set up your client credentials with the Configuration class
3. Initialize the AnnotateApi class and add the source DOC file
4. Create an underline annotation and define its properties with AnnotationInfo
5. Apply the annotation options with AnnotateOptions
6. Add underline annotation to the DOC file using the Annotate method

After preparing the DOC file and identifying the text that needs attention, define the annotation’s position on the selected page. Specify the underline annotation settings and send a request through the .NET REST API. It adds the annotation and saves the resulting DOC document. You can use the output file for further processing. Text underline annotations can make document review more practical when several people need to examine the same content. Developers can mark important clauses, terminology, and corrections in their C#, VB.NET, and ASP.NET applications. Our Word document annotation API also helps when you need to apply the same markups repeatedly. It becomes easier to adjust annotation settings to suit different review requirements while the original document content remains unchanged.

Code to Add Underline Annotations to DOC in C# .NET

The GroupDocs.Annotation Cloud .NET SDK lets you add underline annotations to DOC files from C# applications across Windows, Linux, and macOS. The same approach can fit different situations, from checking business documents and contracts to reviewing drafts and shared reports. If you need a straightforward workflow to underline text in Word DOC files without permanent document formatting, the .NET REST API is the best option. Unlike many other annotation libraries, our cloud SDK is efficient, letting developers mark important text in word-processing documents with simple API calls.

Discover more ways to mark up documents by reviewing our related guide to adding text field annotations to PPT presentations with the .NET REST API.