diff --git a/ArcFormats/ArcNPA.cs b/ArcFormats/ArcNPA.cs
index 2e396fa8..92b5bc11 100644
--- a/ArcFormats/ArcNPA.cs
+++ b/ArcFormats/ArcNPA.cs
@@ -700,7 +700,7 @@ namespace GameRes.Formats.NitroPlus
             if (position >= m_encrypted_length)
                 return m_stream.Read (buffer, offset, count);
             int read = Math.Min (m_encrypted_length - (int)position, count);
-            Array.Copy (m_encrypted.Value, (int)position, buffer, offset, read);
+            Buffer.BlockCopy (m_encrypted.Value, (int)position, buffer, offset, read);
             m_stream.Seek (read, SeekOrigin.Current);
             if (read < count)
             {
diff --git a/ArcFormats/ArcRPA.cs b/ArcFormats/ArcRPA.cs
index d1ce7eb6..3be446c6 100644
--- a/ArcFormats/ArcRPA.cs
+++ b/ArcFormats/ArcRPA.cs
@@ -893,7 +893,7 @@ namespace GameRes.Formats.RenPy
             if (m_position < m_header.Length)
             {
                 int header_count = Math.Min (count, m_header.Length - (int)m_position);
-                Array.Copy (m_header, (int)m_position, buffer, offset, header_count);
+                Buffer.BlockCopy (m_header, (int)m_position, buffer, offset, header_count);
                 m_position += header_count;
                 read += header_count;
                 offset += header_count;
diff --git a/ArcFormats/ArcWILL.cs b/ArcFormats/ArcWILL.cs
index 8af29b62..91a9192c 100644
--- a/ArcFormats/ArcWILL.cs
+++ b/ArcFormats/ArcWILL.cs
@@ -201,7 +201,7 @@ namespace GameRes.Formats.Will
                 header.Write (file_table.Count);
                 foreach (var ext in file_table)
                 {
-                    Array.Copy (ext.Value.Extension, buffer, ext.Value.Extension.Length);
+                    Buffer.BlockCopy (ext.Value.Extension, 0, buffer, 0, ext.Value.Extension.Length);
                     for (int i = ext.Value.Extension.Length; i < 4; ++i)
                         buffer[i] = 0;
                     header.Write (buffer, 0, 4);
@@ -212,7 +212,7 @@ namespace GameRes.Formats.Will
                 {
                     foreach (var entry in ext.Value.Files)
                     {
-                        Array.Copy (entry.RawName, buffer, entry.RawName.Length);
+                        Buffer.BlockCopy (entry.RawName, 0, buffer, 0, entry.RawName.Length);
                         for (int i = entry.RawName.Length; i < buffer.Length; ++i)
                             buffer[i] = 0;
                         header.Write (buffer);
diff --git a/ArcFormats/ImageDRG.cs b/ArcFormats/ImageDRG.cs
index ea4533f8..faf81442 100644
--- a/ArcFormats/ImageDRG.cs
+++ b/ArcFormats/ImageDRG.cs
@@ -142,7 +142,7 @@ namespace GameRes.Formats.DRS
                         return null;
                     for (int i = 0; i < count; ++i)
                     {
-                        Array.Copy (output, src_offset, output, out_pos, 3);
+                        Buffer.BlockCopy (output, src_offset, output, out_pos, 3);
                         out_pos += 3;
                     }
                     pixel_count -= count * 3;
@@ -174,7 +174,7 @@ namespace GameRes.Formats.DRS
                     src_offset = out_pos - 3 * input.ReadByte ();
                     if (count > pixel_count || src_offset < 0 || src_offset == out_pos)
                         return null;
-                    Array.Copy (output, src_offset, output, out_pos, count);
+                    Buffer.BlockCopy (output, src_offset, output, out_pos, count);
                     out_pos += count;
                     pixel_count -= count;
                     break;
@@ -186,7 +186,7 @@ namespace GameRes.Formats.DRS
                         src_offset = out_pos - 3 * (off_hi << 8 | off_lo);
                         if (count > pixel_count || src_offset < 0 || src_offset == out_pos)
                             return null;
-                        Array.Copy (output, src_offset, output, out_pos, count);
+                        Buffer.BlockCopy (output, src_offset, output, out_pos, count);
                         out_pos += count;
                         pixel_count -= count;
                         break;
diff --git a/ArcFormats/KogadoCocotte.cs b/ArcFormats/KogadoCocotte.cs
index 0336c9d6..609a3c69 100644
--- a/ArcFormats/KogadoCocotte.cs
+++ b/ArcFormats/KogadoCocotte.cs
@@ -600,7 +600,7 @@ namespace GameRes.Formats.Kogado
                     n++;
                 if (n > 0)
                 {
-                    Array.Copy (m_MTFTable, 0, m_MTFTable, 1, n);
+                    Buffer.BlockCopy (m_MTFTable, 0, m_MTFTable, 1, n);
                     m_MTFTable[0] = c;
                 }
                 dest[i] = n;
@@ -616,7 +616,7 @@ namespace GameRes.Formats.Kogado
                 byte c = m_MTFTable[n];
                 if (n > 0)
                 {
-                    Array.Copy (m_MTFTable, 0, m_MTFTable, 1, n);
+                    Buffer.BlockCopy (m_MTFTable, 0, m_MTFTable, 1, n);
                     m_MTFTable[0] = c;
                 }
                 dest[i] = c;
diff --git a/ArcFormats/Properties/AssemblyInfo.cs b/ArcFormats/Properties/AssemblyInfo.cs
index 5600245c..82d0f281 100644
--- a/ArcFormats/Properties/AssemblyInfo.cs
+++ b/ArcFormats/Properties/AssemblyInfo.cs
@@ -32,5 +32,5 @@ using System.Runtime.InteropServices;
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion ("1.0.3.22")]
-[assembly: AssemblyFileVersion ("1.0.3.22")]
+[assembly: AssemblyVersion ("1.0.3.23")]
+[assembly: AssemblyFileVersion ("1.0.3.23")]
diff --git a/GameRes/ArcView.cs b/GameRes/ArcView.cs
index 933920f6..5a8d3ded 100644
--- a/GameRes/ArcView.cs
+++ b/GameRes/ArcView.cs
@@ -56,9 +56,7 @@ namespace GameRes
                     break;
                 if (buffer.Length == size)
                 {
-                    byte[] new_buffer = new byte[checked(size/2*3)];
-                    Array.Copy (buffer, new_buffer, size);
-                    buffer = new_buffer;
+                    Array.Resize (ref buffer, checked(size/2*3));
                 }
                 buffer[size++] = (byte)b;
             }
diff --git a/GameRes/Utility.cs b/GameRes/Utility.cs
index 072dea93..6f9dc9e5 100644
--- a/GameRes/Utility.cs
+++ b/GameRes/Utility.cs
@@ -77,7 +77,7 @@ namespace GameRes.Utility
             {
                 if (preceding > count)
                     preceding = count;
-                System.Array.Copy (data, src, data, dst, preceding);
+                System.Buffer.BlockCopy (data, src, data, dst, preceding);
                 src = dst;
                 dst += preceding;
                 count -= preceding;