---
title: "Remove PDF annotations in C# .NET | Nutrient .NET SDK"
canonical_url: "https://www.nutrient.io/guides/dotnet/annotations/remove/"
md_url: "https://www.nutrient.io/guides/dotnet/annotations/remove.md"
last_updated: "2026-05-21T17:12:02.199Z"
description: "Learn how to remove annotations from PDF documents programmatically in C# .NET using Nutrient .NET SDK. Clear comments, highlights, and other markups from PDFs."
---

# Remove PDF annotations in C# .NET

To remove an annotation in a PDF document, follow these steps:

1. Create a `GdPicturePDF` object.

2. Load a PDF file with the [`LoadFromFile` method](https://www.nutrient.io/api/gdpicture/GdPicture.NET.14.API~GdPicture14.GdPicturePDF~LoadFromFile.html).

3. Select the PDF page where the searched annotation is located.

4. Loop through all the annotations on the selected page. Use the [`GetAnnotationCount` method](https://www.nutrient.io/api/gdpicture/GdPicture.NET.14.API~GdPicture14.GdPicturePDF~GetAnnotationCount.html) to get the total number of annotations on the selected page.

5. Determine the searched annotation by any of its parameters, such as its title, type, or subject. Use the methods starting with the `GetAnnotation` prefix. The full list is available in the [get properties](https://www.nutrient.io/guides/dotnet/annotations/get-properties.md) guide.

6. Remove the annotation with the [`RemoveAnnotation` method](https://www.nutrient.io/api/gdpicture/GdPicture.NET.14.API~GdPicture14.GdPicturePDF~RemoveAnnotation.html). It requires the annotation index as its parameter.

7. Save the PDF document to a file with the [`SaveToFile` method](https://www.nutrient.io/api/gdpicture/GdPicture.NET.14.API~GdPicture14.GdPicturePDF~SaveToFile.html).

To remove all free text annotations located on the first page of a PDF document, use the following code:

### C#

```csharp

using GdPicturePDF gdpicturePDF = new GdPicturePDF();
gdpicturePDF.LoadFromFile(@"C:\temp\source.pdf");
// Select the PDF page.
gdpicturePDF.SelectPage(1);
// Get the annotation count.
int annotCount = gdpicturePDF.GetAnnotationCount();
// Loop through all annotations.
for (int i = annotCount-1; i >= 0 ; i--)
{
    // Check if the current annotation is of the `FreeText` type.
    if (gdpicturePDF.GetAnnotationSubType(i) == "FreeText")
    {
        // Remove the current annotation.
        gdpicturePDF.RemoveAnnotation(i);
    }
}
gdpicturePDF.SaveToFile(@"C:\temp\output.pdf");

```

### VB.NET

```vb

Using gdpicturePDF As GdPicturePDF = New GdPicturePDF()
    gdpicturePDF.LoadFromFile("C:\temp\source.pdf")
    ' Select the PDF page.
    gdpicturePDF.SelectPage(1)
    ' Get the annotation count.
    Dim annotCount As Integer = gdpicturePDF.GetAnnotationCount()
    ' Loop through all annotations.
    For i = annotCount - 1 To 0
        ' Check if the current annotation is of the `FreeText` type.
        If gdpicturePDF.GetAnnotationSubType(i) Is "FreeText" Then
            ' Remove the current annotation.
            gdpicturePDF.RemoveAnnotation(i)
        End If
    Next
    gdpicturePDF.SaveToFile("C:\temp\output.pdf")
End Using

```

#### Used methods

- [`GetAnnotationCount`](https://www.nutrient.io/api/gdpicture/GdPicture.NET.14.API~GdPicture14.GdPicturePDF~GetAnnotationCount.html)

- [`GetAnnotationSubType`](/api/gdpicture/GdPicture.NET.14.API~GdPicture14.GdPicturePDF~GetAnnotationSubType.html)

- [`LoadFromFile`](https://www.nutrient.io/api/gdpicture/GdPicture.NET.14.API~GdPicture14.GdPicturePDF~LoadFromFile.html)

- [`RemoveAnnotation`](https://www.nutrient.io/api/gdpicture/GdPicture.NET.14.API~GdPicture14.GdPicturePDF~RemoveAnnotation.html)

- [`SaveToFile`](https://www.nutrient.io/api/gdpicture/GdPicture.NET.14.API~GdPicture14.GdPicturePDF~SaveToFile.html)

- [`SelectPage`](/api/gdpicture/GdPicture.NET.14.API~GdPicture14.GdPicturePDF~SelectPage.html)

#### Related topics

- [Load a file](/guides/dotnet/load-a-file.md)

- [Save a file](/guides/dotnet/save-a-file.md)
---

## Related pages

- [Custom annotations](/guides/dotnet/annotations/custom-annotations.md)
- [Annotate on images in C# .NET](/guides/dotnet/annotations/annotate-on-images.md)
- [Attach an image to an annotation in C#](/guides/dotnet/annotations/attach-an-image.md)
- [Attach a file to an annotation in C#](/guides/dotnet/annotations/attach-a-file.md)
- [Create an annotation in a PDF using C#](/guides/dotnet/annotations/create.md)
- [Edit PDF annotations in C#](/guides/dotnet/annotations/edit.md)
- [Export XMP annotation data in C# .NET](/guides/dotnet/annotations/export-xmp.md)
- [Export annotation data from PDFs in C# .NET](/guides/dotnet/annotations/export-pdf.md)
- [Flatten PDF annotations in C# .NET](/guides/dotnet/annotations/flatten.md)
- [Get PDF annotation properties in C# .NET](/guides/dotnet/annotations/get-properties.md)
- [Import XFDF annotation data to PDFs in C# .NET](/guides/dotnet/annotations/import-xfdf.md)
- [PDF annotations in C#.NET](/guides/dotnet/annotations.md)
- [Add PDF actions using C# in form fields](/guides/dotnet/annotations/pdf-actions-support.md)
- [Import XMP annotation data to PDF or image in C#](/guides/dotnet/annotations/import-xmp.md)
- [Stamp a PDF document in C# .NET](/guides/dotnet/annotations/stamp-a-document.md)
- [XMP annotations in C# .NET](/guides/dotnet/annotations/xmp-annotations.md)