Added the sample

Author: Sowmiya Loganathan

Annotation/Modify-the-redaction-annotation-in-PDF-document/.NET-Standard/Modify-the-redaction-annotation-in-PDF-document.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.1.32407.343
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Modify-the-redaction-annotation-in-PDF-document", "Modify-the-redaction-annotation-in-PDF-document\Modify-the-redaction-annotation-in-PDF-document.csproj", "{5D66E67B-6C9E-431A-AA29-44E78EE74F4D}"
+EndProject
+Global
+GlobalSection(SolutionConfigurationPlatforms) = preSolution
+Debug|Any CPU = Debug|Any CPU
+Release|Any CPU = Release|Any CPU
+EndGlobalSection
+GlobalSection(ProjectConfigurationPlatforms) = postSolution
+{5D66E67B-6C9E-431A-AA29-44E78EE74F4D}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+{5D66E67B-6C9E-431A-AA29-44E78EE74F4D}.Debug|Any CPU.Build.0 = Debug|Any CPU
+{5D66E67B-6C9E-431A-AA29-44E78EE74F4D}.Release|Any CPU.ActiveCfg = Release|Any CPU
+{5D66E67B-6C9E-431A-AA29-44E78EE74F4D}.Release|Any CPU.Build.0 = Release|Any CPU
+EndGlobalSection
+GlobalSection(SolutionProperties) = preSolution
+HideSolutionNode = FALSE
+EndGlobalSection
+GlobalSection(ExtensibilityGlobals) = postSolution
+SolutionGuid = {BC016595-2A60-4F64-A066-4BF54EC66492}
+EndGlobalSection
+EndGlobal

Annotation/Modify-the-redaction-annotation-in-PDF-document/.NET-Standard/Modify-the-redaction-annotation-in-PDF-document/Input.pdf

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+<Project Sdk="Microsoft.NET.Sdk">
+
+ <PropertyGroup>
+ <OutputType>Exe</OutputType>
+ <TargetFramework>net6.0</TargetFramework>
+ <RootNamespace>Modify_the_redaction_annotation_in_PDF_document</RootNamespace>
+ <ImplicitUsings>enable</ImplicitUsings>
+ <Nullable>enable</Nullable>
+ </PropertyGroup>
+
+ <ItemGroup>
+ <PackageReference Include="Syncfusion.Pdf.Imaging.Net.Core" Version="20.2.0.50" />
+ </ItemGroup>
+
+</Project>

Annotation/Modify-the-redaction-annotation-in-PDF-document/.NET-Standard/Modify-the-redaction-annotation-in-PDF-document/Modify-the-redaction-annotation-in-PDF-document.csproj

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+// See https://aka.ms/new-console-template for more information
+
+using Syncfusion.Drawing;
+using Syncfusion.Pdf.Graphics;
+using Syncfusion.Pdf.Interactive;
+using Syncfusion.Pdf.Parsing;
+using Syncfusion.Pdf.Redaction;
+
+//Get stream from an existing PDF document. 
+FileStream docStream = new FileStream("../../../Input.pdf", FileMode.Open, FileAccess.Read);
+
+//Load the PDF document. 
+PdfLoadedDocument loadedDocument = new PdfLoadedDocument(docStream);
+
+foreach (PdfAnnotation annot in loadedDocument.Pages[0].Annotations)
+{
+ //Check for the Redaction annotation.
+ if (annot is PdfLoadedRedactionAnnotation)
+ {
+ //Load the redaction annotation. 
+ PdfLoadedRedactionAnnotation redactAnnot = annot as PdfLoadedRedactionAnnotation;
+
+ //Assign the Bounds values.
+ redactAnnot.Bounds = new RectangleF(50, 50, 100, 100);
+
+ //Assign the OverlayText.
+ redactAnnot.OverlayText = "Redaction";
+
+ //Assign the InnerColor.
+ redactAnnot.InnerColor = Color.Yellow;
+
+ //Assign the BorderColor.
+ redactAnnot.BorderColor = Color.Green;
+
+ //Assign the TextColor.
+ redactAnnot.TextColor = Color.Red;
+
+ //Assign the TextAlignment.
+ redactAnnot.TextAlignment = PdfTextAlignment.Right;
+
+ //Assign the RepeatText.
+ redactAnnot.RepeatText = true;
+
+ //Flatten the annotations in the page.
+ redactAnnot.Flatten = true;
+ }
+
+ loadedDocument.Redact();
+
+ //Save the document.
+ using (FileStream outputFileStream = new FileStream(Path.GetFullPath(@"../../../Output.pdf"), FileMode.Create, FileAccess.ReadWrite))
+ {
+ loadedDocument.Save(outputFileStream);
+ }
+
+ //Close the document.
+ loadedDocument.Close(true);
+}