diff --git a/SabreTools.Serialization/Models/VPK/Constants.cs b/SabreTools.Serialization/Models/VPK/Constants.cs
index 1f239653..c71210c7 100644
--- a/SabreTools.Serialization/Models/VPK/Constants.cs
+++ b/SabreTools.Serialization/Models/VPK/Constants.cs
@@ -18,4 +18,4 @@ namespace SabreTools.Data.Models.VPK
         /// </summary>
         public const int HL_VPK_CHECKSUM_LENGTH = 0x00008000;
     }
-}
\ No newline at end of file
+}
diff --git a/SabreTools.Serialization/Models/VPK/DirectoryItem.cs b/SabreTools.Serialization/Models/VPK/DirectoryItem.cs
index 3e416401..7317868a 100644
--- a/SabreTools.Serialization/Models/VPK/DirectoryItem.cs
+++ b/SabreTools.Serialization/Models/VPK/DirectoryItem.cs
@@ -4,13 +4,13 @@ namespace SabreTools.Data.Models.VPK
     /// <see href="https://developer.valvesoftware.com/wiki/VPK_(file_format)"/>
     public sealed class DirectoryItem
     {
-        public string? Extension { get; set; }
+        public string Extension { get; set; }
 
-        public string? Path { get; set; }
+        public string Path { get; set; }
 
-        public string? Name { get; set; }
+        public string Name { get; set; }
 
-        public DirectoryEntry? DirectoryEntry { get; set; }
+        public DirectoryEntry DirectoryEntry { get; set; }
 
         public byte[] PreloadData { get; set; }
     }
diff --git a/SabreTools.Serialization/Models/VPK/File.cs b/SabreTools.Serialization/Models/VPK/File.cs
index 0ace3b8d..d7ddf79f 100644
--- a/SabreTools.Serialization/Models/VPK/File.cs
+++ b/SabreTools.Serialization/Models/VPK/File.cs
@@ -9,21 +9,23 @@ namespace SabreTools.Data.Models.VPK
         /// <summary>
         /// Header data
         /// </summary>
-        public Header? Header { get; set; }
+        public Header Header { get; set; }
 
         /// <summary>
         /// Extended header data
         /// </summary>
+        /// <remarks>Version 2 only</remarks>
         public ExtendedHeader? ExtendedHeader { get; set; }
 
         /// <summary>
         /// Archive hashes data
         /// </summary>
+        /// <remarks>Version 2 only</remarks>
         public ArchiveHash[]? ArchiveHashes { get; set; }
 
         /// <summary>
         /// Directory items data
         /// </summary>
-        public DirectoryItem[]? DirectoryItems { get; set; }
+        public DirectoryItem[] DirectoryItems { get; set; }
     }
 }
diff --git a/SabreTools.Serialization/Wrappers/VPK.Extraction.cs b/SabreTools.Serialization/Wrappers/VPK.Extraction.cs
index 7f4ae5f9..223fc531 100644
--- a/SabreTools.Serialization/Wrappers/VPK.Extraction.cs
+++ b/SabreTools.Serialization/Wrappers/VPK.Extraction.cs
@@ -11,7 +11,7 @@ namespace SabreTools.Serialization.Wrappers
         public bool Extract(string outputDirectory, bool includeDebug)
         {
             // If we have no directory items
-            if (DirectoryItems == null || DirectoryItems.Length == 0)
+            if (DirectoryItems.Length == 0)
                 return false;
 
             // Loop through and extract all files to the output
@@ -34,7 +34,7 @@ namespace SabreTools.Serialization.Wrappers
         public bool ExtractFile(int index, string outputDirectory, bool includeDebug)
         {
             // If we have no directory items
-            if (DirectoryItems == null || DirectoryItems.Length == 0)
+            if (DirectoryItems.Length == 0)
                 return false;
 
             // If the directory item index is invalid
@@ -43,8 +43,6 @@ namespace SabreTools.Serialization.Wrappers
 
             // Get the directory item
             var directoryItem = DirectoryItems[index];
-            if (directoryItem.DirectoryEntry == null)
-                return false;
 
             // If we have an item with no archive
             byte[] data = [];
diff --git a/SabreTools.Serialization/Wrappers/VPK.Printing.cs b/SabreTools.Serialization/Wrappers/VPK.Printing.cs
index 38a4db68..a923400b 100644
--- a/SabreTools.Serialization/Wrappers/VPK.Printing.cs
+++ b/SabreTools.Serialization/Wrappers/VPK.Printing.cs
@@ -24,17 +24,10 @@ namespace SabreTools.Serialization.Wrappers
             Print(builder, Model.DirectoryItems);
         }
 
-        private static void Print(StringBuilder builder, Header? header)
+        private static void Print(StringBuilder builder, Header header)
         {
             builder.AppendLine("  Header Information:");
             builder.AppendLine("  -------------------------");
-            if (header == null)
-            {
-                builder.AppendLine("  No header");
-                builder.AppendLine();
-                return;
-            }
-
             builder.AppendLine(header.Signature, "  Signature");
             builder.AppendLine(header.Version, "  Version");
             builder.AppendLine(header.TreeSize, "  Tree size");
@@ -84,11 +77,11 @@ namespace SabreTools.Serialization.Wrappers
             builder.AppendLine();
         }
 
-        private static void Print(StringBuilder builder, DirectoryItem[]? entries)
+        private static void Print(StringBuilder builder, DirectoryItem[] entries)
         {
             builder.AppendLine("  Directory Items Information:");
             builder.AppendLine("  -------------------------");
-            if (entries == null || entries.Length == 0)
+            if (entries.Length == 0)
             {
                 builder.AppendLine("  No directory items");
                 builder.AppendLine();
@@ -112,16 +105,10 @@ namespace SabreTools.Serialization.Wrappers
             builder.AppendLine();
         }
 
-        private static void Print(StringBuilder builder, DirectoryEntry? entry)
+        private static void Print(StringBuilder builder, DirectoryEntry entry)
         {
             builder.AppendLine("    Directory Entry:");
             builder.AppendLine("    -------------------------");
-            if (entry == null)
-            {
-                builder.AppendLine("    [NULL]");
-                return;
-            }
-
             builder.AppendLine(entry.CRC, "    CRC");
             builder.AppendLine(entry.PreloadBytes, "    Preload bytes");
             builder.AppendLine(entry.ArchiveIndex, "    Archive index");
diff --git a/SabreTools.Serialization/Wrappers/VPK.cs b/SabreTools.Serialization/Wrappers/VPK.cs
index 39c16890..919267aa 100644
--- a/SabreTools.Serialization/Wrappers/VPK.cs
+++ b/SabreTools.Serialization/Wrappers/VPK.cs
@@ -44,10 +44,8 @@ namespace SabreTools.Serialization.Wrappers
 
                 // Get the archive count
                 ushort archiveCount = 0;
-                foreach (var di in DirectoryItems ?? [])
+                foreach (var di in DirectoryItems)
                 {
-                    if (di.DirectoryEntry == null)
-                        continue;
                     if (di.DirectoryEntry.ArchiveIndex == HL_VPK_NO_ARCHIVE)
                         continue;
 
@@ -71,7 +69,7 @@ namespace SabreTools.Serialization.Wrappers
         }
 
         /// <inheritdoc cref="Models.VPK.File.DirectoryItems"/>
-        public Data.Models.VPK.DirectoryItem[]? DirectoryItems => Model.DirectoryItems;
+        public Data.Models.VPK.DirectoryItem[] DirectoryItems => Model.DirectoryItems;
 
         #endregion