From 85ee89f745b5f45b95e1b983058050fb6bbacbfc Mon Sep 17 00:00:00 2001
From: Patrick Ammann <patrick.ammann@siemens.com>
Date: Thu, 2 Jun 2022 09:48:04 +0200
Subject: [PATCH] feat: allow to set AcroForm

---
 PdfSharpCore/Pdf.Advanced/PdfCatalog.cs | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/PdfSharpCore/Pdf.Advanced/PdfCatalog.cs b/PdfSharpCore/Pdf.Advanced/PdfCatalog.cs
index b34c661d..ab489c62 100644
--- a/PdfSharpCore/Pdf.Advanced/PdfCatalog.cs
+++ b/PdfSharpCore/Pdf.Advanced/PdfCatalog.cs
@@ -160,14 +160,15 @@ internal PdfOutlineCollection Outlines
         /// </summary>
         public PdfAcroForm AcroForm
         {
-            get
+            get { return (PdfAcroForm)Elements.GetValue(Keys.AcroForm); }
+            set
             {
-                if (_acroForm == null)
-                    _acroForm = (PdfAcroForm)Elements.GetValue(Keys.AcroForm);
-                return _acroForm;
+                if (Elements.ContainsKey(Keys.AcroForm))
+                    Elements[Keys.AcroForm] = value;
+                else
+                    Elements.Add(Keys.AcroForm, value);
             }
         }
-        PdfAcroForm _acroForm;
 
         /// <summary>
         /// Gets or sets the language identifier specifying the natural language for all text in the document.