public void AddReview(
    string author,
    PdfAnnotationReviewStatus reviewStatus
)

Public Sub AddReview(
    author As String,
    reviewStatus As PdfAnnotationReviewStatus
)

using DevExpress.Pdf;

using (PdfDocumentProcessor processor = new PdfDocumentProcessor())
{
    // Load a document
    processor.LoadDocument("..\\..\\Document.pdf");

    // Access the first page properties
    PdfPageFacade pageFacade = processor.DocumentFacade.Pages[0];

    foreach(PdfMarkupAnnotationFacade markupAnnotation in pageFacade.Annotations)
    {

        // Check the annotation author
        if (markupAnnotation.Author == "Brian Zetc") 
        {

          // Add a review to the annotation
            markupAnnotation.AddReview("Cardle Anita W", PdfAnnotationReviewStatus.Accepted);
        }
    }
    // Save the result
    processor.SaveDocument("..\\..\\Result.pdf");
}

Imports DevExpress.Pdf

Using processor As New PdfDocumentProcessor()
  ' Load a document
  processor.LoadDocument("..\..\Document.pdf")

  ' Access the first page properties
  Dim pageFacade As PdfPageFacade = processor.DocumentFacade.Pages(0)

  For Each markupAnnotation As PdfMarkupAnnotationFacade In pageFacade.Annotations

    ' Check the annotation author
    If markupAnnotation.Author = "Brian Zetc" Then

      ' Add a review to the annotation
      markupAnnotation.AddReview("Cardle Anita W", PdfAnnotationReviewStatus.Accepted)
    End If
  Next markupAnnotation
  ' Save the result
  processor.SaveDocument("..\..\Result.pdf")
End Using