1005727-ug: Added the UG documentation for identify the document permissions

Author: sameerkhan001

Security/PDF-permission-viewer/.NET/PDF-permission-viewer.slnx

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+<Solution>
+  <Project Path="PDF-permission-viewer/PDF-permission-viewer.csproj" />
+</Solution>

Security/PDF-permission-viewer/.NET/PDF-permission-viewer/Data/Input.pdf

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

Security/PDF-permission-viewer/.NET/PDF-permission-viewer/PDF-permission-viewer.csproj

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+using Syncfusion.Pdf.Parsing;
+using Syncfusion.Pdf.Security;
+
+// Load an existing PDF
+using (PdfLoadedDocument loadedDocument = new PdfLoadedDocument(Path.GetFullPath(@"Data/Input.pdf")))
+{
+    // Access the document security settings
+    PdfSecurity security = loadedDocument.Security;
+    // Get the permission flags (bitwise enum)
+    PdfPermissionsFlags permissions = security.Permissions;
+    Console.WriteLine("Permissions in the document:");
+    // Enumerate all flags and print the enabled ones
+    foreach (PdfPermissionsFlags flag in Enum.GetValues(typeof(PdfPermissionsFlags)))
+    {
+        if (flag == 0) continue; // Skip None (0)
+        // Check whether the specific flag is set
+        if (permissions.HasFlag(flag))
+        {
+            Console.WriteLine($"- {flag}");
+        }
+    }
+}