979044: Added sample code for DisableAutoFormat Property in the PD form fields.

Forms/Disable-Auto-Formatting-in-FormFields/.NET/Disable-Auto-Formatting-in-FormFields.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.14.36408.4 d17.14
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Disable-Auto-Formatting-in-FormFields", "Disable-Auto-Formatting-in-FormFields\Disable-Auto-Formatting-in-FormFields.csproj", "{34749AFC-1835-4920-BB8C-CB1BA56D30DC}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{34749AFC-1835-4920-BB8C-CB1BA56D30DC}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{34749AFC-1835-4920-BB8C-CB1BA56D30DC}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{34749AFC-1835-4920-BB8C-CB1BA56D30DC}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{34749AFC-1835-4920-BB8C-CB1BA56D30DC}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {FC101EA9-8443-4983-8315-FD8699DF19F9}
+	EndGlobalSection
+EndGlobal

Forms/Disable-Auto-Formatting-in-FormFields/.NET/Disable-Auto-Formatting-in-FormFields/Disable-Auto-Formatting-in-FormFields.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <RootNamespace>Disable_Auto_Formatting_in_FormFields</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Syncfusion.Pdf.Net.Core" Version="*" />
+  </ItemGroup>
+
+</Project>

Forms/Disable-Auto-Formatting-in-FormFields/.NET/Disable-Auto-Formatting-in-FormFields/Program.cs

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+using Syncfusion.Pdf.Parsing;
+
+// Load the existing PDF document
+PdfLoadedDocument loadedDocument = new PdfLoadedDocument(new FileStream(Path.GetFullPath(@"Data/Input.pdf"), FileMode.Open, FileAccess.Read));
+
+// Access the form field named "email" from the PDF form
+PdfLoadedField field = loadedDocument.Form.Fields["email"] as PdfLoadedField;
+
+// Disable automatic formatting to prevent behaviors like JavaScript execution
+loadedDocument.Form.DisableAutoFormat = true;
+
+// Check if the field is a text box and assign a plain string value
+if (field is PdfLoadedTextBoxField textBoxField)
+{
+    // Set the text box value to a raw email string without formatting
+    textBoxField.Text = "12345@gmail.com";
+}
+
+// Save the modified PDF document to a new file using a file stream
+using (FileStream outputStream = new FileStream(Path.GetFullPath(@"Output/Output.pdf"), FileMode.Create, FileAccess.ReadWrite))
+{
+    loadedDocument.Save(outputStream);
+}
+// Close and dispose the document to release resources
+loadedDocument.Close(true);