From cc4cce818937dc13b11e0837acbbce010e0190ad Mon Sep 17 00:00:00 2001
From: icnocop <icnocop@users.noreply.github.com>
Date: Wed, 10 Apr 2019 17:46:49 -0700
Subject: [PATCH] Allow setting the PdfDocument.Info.Producer property From
 https://github.com/2Toad/PDFsharp/commit/f53f15a95f5cb5d7aa0c99329764eb5c5ea3afe1

---
 .gitignore                                 |  6 +++---
 src/PdfSharp/Pdf/PdfDocument.cs            | 14 +++-----------
 src/PdfSharp/Pdf/PdfDocumentInformation.cs |  3 ++-
 3 files changed, 8 insertions(+), 15 deletions(-)

diff --git a/.gitignore b/.gitignore
index ef5f1b7f..9047075d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -22,7 +22,7 @@ bld/
 [Bb]in/
 [Oo]bj/
 
-# Visual Studo 2015 cache/options directory
+# Visual Studio 2015 cache/options directory
 .vs/
 
 # MSTest test Results
@@ -90,7 +90,7 @@ _ReSharper*/
 *.[Rr]e[Ss]harper
 *.DotSettings.user
 
-# JustCode is a .NET coding addin-in
+# JustCode is a .NET coding add-in
 .JustCode
 
 # TeamCity is a build add-in
@@ -129,7 +129,7 @@ publish/
 # Publish Web Output
 *.[Pp]ublish.xml
 *.azurePubxml
-# TODO: Comment the next line if you want to checkin your web deploy settings 
+# TODO: Comment the next line if you want to checkin your web deploy settings
 # but database connection strings (with potential passwords) will be unencrypted
 *.pubxml
 *.publishproj
diff --git a/src/PdfSharp/Pdf/PdfDocument.cs b/src/PdfSharp/Pdf/PdfDocument.cs
index fe1b9af5..7995c6d1 100644
--- a/src/PdfSharp/Pdf/PdfDocument.cs
+++ b/src/PdfSharp/Pdf/PdfDocument.cs
@@ -462,17 +462,9 @@ internal override void PrepareForSave()
             if (info.Elements[PdfDocumentInformation.Keys.Creator] == null)
                 info.Creator = pdfSharpProducer;
 
-            // Keep original producer if file was imported.
-            string producer = info.Producer;
-            if (producer.Length == 0)
-                producer = pdfSharpProducer;
-            else
-            {
-                // Prevent endless concatenation if file is edited with PDFsharp more than once.
-                if (!producer.StartsWith(VersionInfo.Title))
-                    producer = pdfSharpProducer + " (Original: " + producer + ")";
-            }
-            info.Elements.SetString(PdfDocumentInformation.Keys.Producer, producer);
+            // Set Producer if value is undefined
+            if (info.Elements[PdfDocumentInformation.Keys.Producer] == null)
+                info.Producer = VersionInfo.Producer;
 
             // Prepare used fonts.
             if (_fontTable != null)
diff --git a/src/PdfSharp/Pdf/PdfDocumentInformation.cs b/src/PdfSharp/Pdf/PdfDocumentInformation.cs
index 11149571..e8d6ae49 100644
--- a/src/PdfSharp/Pdf/PdfDocumentInformation.cs
+++ b/src/PdfSharp/Pdf/PdfDocumentInformation.cs
@@ -93,11 +93,12 @@ public string Creator
         }
 
         /// <summary>
-        /// Gets the producer application (for example, PDFsharp).
+        /// Gets or sets the name of the producer application (for example, PDFsharp).
         /// </summary>
         public string Producer
         {
             get { return Elements.GetString(Keys.Producer); }
+            set { Elements.SetString(Keys.Producer, value); }
         }
 
         /// <summary>