diff --git a/SharpCompress/Compressor/LZMA/CRC.cs b/SharpCompress/Compressor/LZMA/CRC.cs
index e97a5f28..17ec9f6e 100644
--- a/SharpCompress/Compressor/LZMA/CRC.cs
+++ b/SharpCompress/Compressor/LZMA/CRC.cs
@@ -79,33 +79,5 @@ namespace SharpCompress.Compressor.LZMA
 
             return crc;
         }
-
-#if !PORTABLE && !NETFX_CORE
-        public static unsafe uint Update(uint crc, byte* buffer, int length)
-        {
-            while (length > 0 && ((int) buffer & 3) != 0)
-            {
-                crc = Update(crc, *buffer);
-                buffer++;
-                length--;
-            }
-
-            while (length >= 4)
-            {
-                crc = Update(crc, *(uint*) buffer);
-                buffer += 4;
-                length -= 4;
-            }
-
-            while (length > 0)
-            {
-                crc = Update(crc, *buffer);
-                length--;
-            }
-
-            return crc;
-        }
-
-#endif
     }
 }
\ No newline at end of file
diff --git a/SharpCompress/Utility.cs b/SharpCompress/Utility.cs
index 38d1c8b7..a6c05f73 100644
--- a/SharpCompress/Utility.cs
+++ b/SharpCompress/Utility.cs
@@ -199,21 +199,11 @@ namespace SharpCompress
         /// </param>
         /// <param name="value">the value to write
         /// </param>
-#if PORTABLE || NETFX_CORE
         public static void WriteLittleEndian(byte[] array, int pos, short value)
         {
             byte[] newBytes = BitConverter.GetBytes(value);
             Array.Copy(newBytes, 0, array, pos, newBytes.Length);
         }
-#else
-        public static unsafe void WriteLittleEndian(byte[] array, int pos, short value)
-        {
-            fixed (byte* numRef = &(array[pos]))
-            {
-                *((short*)numRef) = value;
-            }
-        }
-#endif
 
         /// <summary> Increment a short value at the specified position by the specified amount
         /// (little endian).
@@ -241,21 +231,11 @@ namespace SharpCompress
         /// </param>
         /// <param name="value">the value to write
         /// </param>
-#if PORTABLE || NETFX_CORE
         public static void WriteLittleEndian(byte[] array, int pos, int value)
         {
             byte[] newBytes = BitConverter.GetBytes(value);
             Array.Copy(newBytes, 0, array, pos, newBytes.Length);
         }
-#else
-        public static unsafe void WriteLittleEndian(byte[] array, int pos, int value)
-        {
-            fixed (byte* numRef = &(array[pos]))
-            {
-                *((int*)numRef) = value;
-            }
-        }
-#endif
 
         public static void Initialize<T>(this T[] array, Func<T> func)
         {