Added example solution

Author: irfanajaffer

Forms/Changing-checkmark-and-radiobutton-colors-in-PDF/Changing-checkmark-and-radiobutton-colors-in-PDF.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.13.35617.110 d17.13
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Changing-Checkmark-and-RadioButton-Colors-in-PDF", "Changing-Checkmark-and-RadioButton-Colors-in-PDF\Changing-Checkmark-and-RadioButton-Colors-in-PDF.csproj", "{3DB23055-CE19-4219-98E7-A7292FE77EA8}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{3DB23055-CE19-4219-98E7-A7292FE77EA8}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{3DB23055-CE19-4219-98E7-A7292FE77EA8}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{3DB23055-CE19-4219-98E7-A7292FE77EA8}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{3DB23055-CE19-4219-98E7-A7292FE77EA8}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {33BA272D-C49E-455A-8278-DDDE867443E1}
+	EndGlobalSection
+EndGlobal

Forms/Changing-checkmark-and-radiobutton-colors-in-PDF/Changing-checkmark-and-radiobutton-colors-in-PDF/Changing-checkmark-and-radiobutton-colors-in-PDF.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <RootNamespace>Changing_Checkmark_and_RadioButton_Colors_in_PDF</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <DockerDefaultTargetOS>Linux</DockerDefaultTargetOS>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <None Remove="Data\Input.pdf" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <EmbeddedResource Include="Data\Input.pdf">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </EmbeddedResource>
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.21.0" />
+    <PackageReference Include="Syncfusion.Pdf.NET" Version="*" />
+  </ItemGroup>
+
+</Project>

Forms/Changing-checkmark-and-radiobutton-colors-in-PDF/Changing-checkmark-and-radiobutton-colors-in-PDF/Data/Input.pdf

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+// See https://aka.ms/new-console-template for more information
+
+using Syncfusion.Drawing;
+using Syncfusion.Pdf;
+using Syncfusion.Pdf.Interactive;
+using Syncfusion.Pdf.Parsing;
+using System.IO;
+
+FileStream fileStream = new FileStream(Path.GetFullPath(@"Data/Input.pdf"), FileMode.Open, FileAccess.Read);
+// Load the PDF document
+PdfLoadedDocument loadedDocument = new PdfLoadedDocument(fileStream);
+// Access the existing form fields
+PdfLoadedForm form = loadedDocument.Form;
+// Iterate through the fields
+foreach (PdfLoadedField field in form.Fields)
+{
+    // Check for checkbox fields
+    if (field is PdfLoadedCheckBoxField checkBoxField)
+    {
+        checkBoxField.ForeColor = Color.Red; // Set desired color
+    }
+    // Check for radio button fields
+    else if (field is PdfLoadedRadioButtonListField radioButtonField)
+    {
+        foreach (PdfLoadedRadioButtonItem item in radioButtonField.Items)
+        {
+            item.ForeColor = Color.Blue; // Set desired color
+        }
+    }
+}
+
+//Create file stream.
+using (FileStream outputFileStream = new FileStream(Path.GetFullPath(@"Output/Output.pdf"), FileMode.Create, FileAccess.ReadWrite))
+{
+    //Save the PDF document to file stream.
+    loadedDocument.Save(outputFileStream);
+}
+
+//Close the document.
+loadedDocument.Close(true);