diff --git a/X86Disassembler/PE/DOSHeader.cs b/X86Disassembler/PE/DOSHeader.cs
index d477807..ea30ee4 100644
--- a/X86Disassembler/PE/DOSHeader.cs
+++ b/X86Disassembler/PE/DOSHeader.cs
@@ -26,5 +26,15 @@ namespace X86Disassembler.PE
         public ushort e_oeminfo;     // OEM information; e_oemid specific
         public ushort[] e_res2;      // Reserved words
         public uint e_lfanew;        // File address of new exe header
+        
+        /// <summary>
+        /// Initializes a new instance of the DOSHeader class
+        /// </summary>
+        public DOSHeader()
+        {
+            // Initialize arrays to avoid nullability warnings
+            e_res = new ushort[4];
+            e_res2 = new ushort[10];
+        }
     }
 }
diff --git a/X86Disassembler/PE/ExportDirectory.cs b/X86Disassembler/PE/ExportDirectory.cs
index 3b188e1..5ac097b 100644
--- a/X86Disassembler/PE/ExportDirectory.cs
+++ b/X86Disassembler/PE/ExportDirectory.cs
@@ -17,6 +17,15 @@ namespace X86Disassembler.PE
         public uint AddressOfFunctions;    // RVA of the export address table
         public uint AddressOfNames;        // RVA of the export names table
         public uint AddressOfNameOrdinals; // RVA of the ordinal table
+        
+        /// <summary>
+        /// Initializes a new instance of the ExportDirectory class
+        /// </summary>
+        public ExportDirectory()
+        {
+            // Initialize string field to avoid nullability warning
+            DllName = string.Empty;
+        }
     }
     
     /// <summary>
@@ -29,5 +38,15 @@ namespace X86Disassembler.PE
         public uint Address;          // Function RVA
         public bool IsForwarder;      // True if this is a forwarder
         public string ForwarderName;  // Name of the forwarded function
+        
+        /// <summary>
+        /// Initializes a new instance of the ExportedFunction class
+        /// </summary>
+        public ExportedFunction()
+        {
+            // Initialize string fields to avoid nullability warnings
+            Name = string.Empty;
+            ForwarderName = string.Empty;
+        }
     }
 }
diff --git a/X86Disassembler/PE/ImportDescriptor.cs b/X86Disassembler/PE/ImportDescriptor.cs
index c2d8ed3..5c8370a 100644
--- a/X86Disassembler/PE/ImportDescriptor.cs
+++ b/X86Disassembler/PE/ImportDescriptor.cs
@@ -15,6 +15,15 @@ namespace X86Disassembler.PE
         public uint FirstThunk;          // RVA to first thunk
         
         public List<ImportedFunction> Functions { get; } = new List<ImportedFunction>();
+        
+        /// <summary>
+        /// Initializes a new instance of the ImportDescriptor class
+        /// </summary>
+        public ImportDescriptor()
+        {
+            // Initialize string field to avoid nullability warning
+            DllName = string.Empty;
+        }
     }
     
     /// <summary>
@@ -27,5 +36,14 @@ namespace X86Disassembler.PE
         public bool IsOrdinal;      // True if imported by ordinal
         public ushort Ordinal;      // Ordinal value (if imported by ordinal)
         public uint ThunkRVA;       // RVA of the thunk for this function
+        
+        /// <summary>
+        /// Initializes a new instance of the ImportedFunction class
+        /// </summary>
+        public ImportedFunction()
+        {
+            // Initialize string field to avoid nullability warning
+            Name = string.Empty;
+        }
     }
 }
diff --git a/X86Disassembler/PE/OptionalHeader.cs b/X86Disassembler/PE/OptionalHeader.cs
index 2ac889b..42c7fd4 100644
--- a/X86Disassembler/PE/OptionalHeader.cs
+++ b/X86Disassembler/PE/OptionalHeader.cs
@@ -45,6 +45,22 @@ namespace X86Disassembler.PE
         
         public DataDirectory[] DataDirectories; // Data directories
         
+        /// <summary>
+        /// Initializes a new instance of the OptionalHeader class
+        /// </summary>
+        public OptionalHeader()
+        {
+            // Initialize object fields to avoid nullability warnings
+            ImageBase = 0u; // Default to 32-bit value
+            SizeOfStackReserve = 0u;
+            SizeOfStackCommit = 0u;
+            SizeOfHeapReserve = 0u;
+            SizeOfHeapCommit = 0u;
+            
+            // Initialize array to avoid nullability warning
+            DataDirectories = new DataDirectory[0];
+        }
+        
         /// <summary>
         /// Determines if the PE file is 64-bit based on the Magic value
         /// </summary>
diff --git a/X86Disassembler/PE/PEFormat.cs b/X86Disassembler/PE/PEFormat.cs
index bd41bfc..dbb8c62 100644
--- a/X86Disassembler/PE/PEFormat.cs
+++ b/X86Disassembler/PE/PEFormat.cs
@@ -82,6 +82,17 @@ namespace X86Disassembler.PE
             _fileHeaderParser = new FileHeaderParser();
             _optionalHeaderParser = new OptionalHeaderParser();
             _sectionHeaderParser = new SectionHeaderParser();
+            
+            // Initialize properties to avoid nullability warnings
+            DosHeader = new DOSHeader();
+            FileHeader = new FileHeader();
+            OptionalHeader = new OptionalHeader();
+            ExportDirectory = new ExportDirectory();
+            
+            // These will be initialized during Parse()
+            _peUtility = null!;
+            _exportDirectoryParser = null!;
+            _importDescriptorParser = null!;
         }
         
         /// <summary>
@@ -113,7 +124,7 @@ namespace X86Disassembler.PE
                     
                     // Parse Optional Header
                     OptionalHeader = _optionalHeaderParser.Parse(reader);
-                    Is64Bit = _optionalHeaderParser.Is64Bit(OptionalHeader);
+                    Is64Bit = OptionalHeader.Is64Bit();
                     
                     // Parse Section Headers
                     for (int i = 0; i < FileHeader.NumberOfSections; i++)
diff --git a/X86Disassembler/PE/Parsers/ExportDirectoryParser.cs b/X86Disassembler/PE/Parsers/ExportDirectoryParser.cs
index 046b7b1..2e71f8b 100644
--- a/X86Disassembler/PE/Parsers/ExportDirectoryParser.cs
+++ b/X86Disassembler/PE/Parsers/ExportDirectoryParser.cs
@@ -140,9 +140,9 @@ namespace X86Disassembler.PE.Parsers
                 function.Address = functionRVA;
                 
                 // Check if this function has a name
-                if (ordinalToName.TryGetValue(i, out string name))
+                if (ordinalToName.TryGetValue(i, out string? name))
                 {
-                    function.Name = name;
+                    function.Name = name ?? $"Ordinal_{function.Ordinal}";
                 }
                 else
                 {
diff --git a/X86Disassembler/PE/SectionHeader.cs b/X86Disassembler/PE/SectionHeader.cs
index a18c929..62cfb9a 100644
--- a/X86Disassembler/PE/SectionHeader.cs
+++ b/X86Disassembler/PE/SectionHeader.cs
@@ -22,6 +22,15 @@ namespace X86Disassembler.PE
         public ushort NumberOfLinenumbers; // Number of line numbers
         public uint Characteristics;       // Characteristics
         
+        /// <summary>
+        /// Initializes a new instance of the SectionHeader class
+        /// </summary>
+        public SectionHeader()
+        {
+            // Initialize string field to avoid nullability warning
+            Name = string.Empty;
+        }
+        
         /// <summary>
         /// Checks if the section contains code
         /// </summary>