How to remove a specific PDF annotation or comment in C# .NET Framework

Let’s begin the process by running this command in our Package Manager console. This will install our API client via NuGet.

Install-Package Cloudmersive.APIClient.NET.DocumentAndDataConvert -Version 2.2.0

Once that has completed, we shall proceed with invoking EditPdfRemoveAnnotationItem and providing the index number of our annotation.

using System;
using System.Diagnostics;
using Cloudmersive.APIClient.NET.DocumentAndDataConvert.Api;
using Cloudmersive.APIClient.NET.DocumentAndDataConvert.Client;
using Cloudmersive.APIClient.NET.DocumentAndDataConvert.Model;
namespace Example
{
public class EditPdfRemoveAnnotationItemExample
{
public void main()
{
// Configure API key authorization: Apikey
Configuration.Default.AddApiKey("Apikey", "YOUR_API_KEY");
// Uncomment below to setup prefix (e.g. Bearer) for API key, if needed
// Configuration.Default.AddApiKeyPrefix("Apikey", "Bearer");
var apiInstance = new EditPdfApi();
var inputFile = new System.IO.Stream(); // System.IO.Stream | Input file to perform the operation on.
var annotationIndex = 56;  // int? | The 0-based index of the annotation in the document
try
{
// Remove a specific PDF annotation, comment in the document
byte[] result = apiInstance.EditPdfRemoveAnnotationItem(inputFile, annotationIndex);
Debug.WriteLine(result);
}
catch (Exception e)
{
Debug.Print("Exception when calling EditPdfApi.EditPdfRemoveAnnotationItem: " + e.Message );
}
}
}
}

That’s it! Our annotation is now gone. We have a ton more useful API functions like this that can save you all kinds of work. They cover everything from converting between file formats to editing documents and images.