diff --git a/SabreTools.DatFiles/DatFile.cs b/SabreTools.DatFiles/DatFile.cs
index 23335032..dc037902 100644
--- a/SabreTools.DatFiles/DatFile.cs
+++ b/SabreTools.DatFiles/DatFile.cs
@@ -34,13 +34,13 @@ namespace SabreTools.DatFiles
         /// DatItems and related statistics
         /// </summary>
         [JsonProperty("items"), XmlElement("items")]
-        public ItemDictionary Items { get; set; } = [];
+        public ItemDictionary Items { get; private set; } = [];
 
         /// <summary>
         /// DatItems and related statistics
         /// </summary>
         [JsonProperty("items"), XmlElement("items")]
-        public ItemDictionaryDB ItemsDB { get; set; } = new ItemDictionaryDB();
+        public ItemDictionaryDB ItemsDB { get; private set; } = new ItemDictionaryDB();
 
         #endregion
 
@@ -155,6 +155,19 @@ namespace SabreTools.DatFiles
 
         #endregion
 
+        #region
+
+        /// <summary>
+        /// Reset the internal item dictionary
+        /// </summary>
+        public void ResetDictionary()
+        {
+            Items = [];
+            ItemsDB = new ItemDictionaryDB();
+        }
+
+        #endregion
+
         #region Filtering
 
         /// <summary>
diff --git a/SabreTools.DatTools/DatFileTool.cs b/SabreTools.DatTools/DatFileTool.cs
index ab042cff..e2416f34 100644
--- a/SabreTools.DatTools/DatFileTool.cs
+++ b/SabreTools.DatTools/DatFileTool.cs
@@ -342,8 +342,7 @@ namespace SabreTools.DatTools
 #endif
             {
                 DatFile diffData = DatFile.Create(datHeaders[j]);
-                diffData.Items = [];
-                diffData.ItemsDB = new ItemDictionaryDB();
+                diffData.ResetDictionary();
                 FillWithSourceIndex(datFile, diffData, j);
                 outDatsArray[j] = diffData;
 #if NET40_OR_GREATER || NETCOREAPP
@@ -393,8 +392,7 @@ namespace SabreTools.DatTools
             dupeData.Header.SetFieldValue<string?>(DatHeader.FileNameKey, dupeData.Header.GetStringFieldValue(DatHeader.FileNameKey) + post);
             dupeData.Header.SetFieldValue<string?>(Models.Metadata.Header.NameKey, dupeData.Header.GetStringFieldValue(Models.Metadata.Header.NameKey) + post);
             dupeData.Header.SetFieldValue<string?>(Models.Metadata.Header.DescriptionKey, dupeData.Header.GetStringFieldValue(Models.Metadata.Header.DescriptionKey) + post);
-            dupeData.Items = [];
-            dupeData.ItemsDB = new ItemDictionaryDB();
+            dupeData.ResetDictionary();
 
             watch.Stop();
 
@@ -494,8 +492,7 @@ namespace SabreTools.DatTools
                 diffData.Header.SetFieldValue<string?>(DatHeader.FileNameKey, diffData.Header.GetStringFieldValue(DatHeader.FileNameKey) + innerpost);
                 diffData.Header.SetFieldValue<string?>(Models.Metadata.Header.NameKey, diffData.Header.GetStringFieldValue(Models.Metadata.Header.NameKey) + innerpost);
                 diffData.Header.SetFieldValue<string?>(Models.Metadata.Header.DescriptionKey, diffData.Header.GetStringFieldValue(Models.Metadata.Header.DescriptionKey) + innerpost);
-                diffData.Items = [];
-                diffData.ItemsDB = new ItemDictionaryDB();
+                diffData.ResetDictionary();
                 outDatsArray[j] = diffData;
 #if NET40_OR_GREATER || NETCOREAPP
             });
@@ -588,8 +585,7 @@ namespace SabreTools.DatTools
             outerDiffData.Header.SetFieldValue<string?>(DatHeader.FileNameKey, outerDiffData.Header.GetStringFieldValue(DatHeader.FileNameKey) + post);
             outerDiffData.Header.SetFieldValue<string?>(Models.Metadata.Header.NameKey, outerDiffData.Header.GetStringFieldValue(Models.Metadata.Header.NameKey) + post);
             outerDiffData.Header.SetFieldValue<string?>(Models.Metadata.Header.DescriptionKey, outerDiffData.Header.GetStringFieldValue(Models.Metadata.Header.DescriptionKey) + post);
-            outerDiffData.Items = [];
-            outerDiffData.ItemsDB = new ItemDictionaryDB();
+            outerDiffData.ResetDictionary();
 
             watch.Stop();
 
@@ -718,10 +714,7 @@ namespace SabreTools.DatTools
 
             // Now remove the file dictionary from the source DAT
             if (delete)
-            {
-                addFrom.Items = [];
-                addFrom.ItemsDB = new ItemDictionaryDB();
-            }
+                addFrom.ResetDictionary();
         }
 
         /// <summary>