diff --git a/ArcFormats/Amaterasu/ArcAMI.cs b/ArcFormats/Amaterasu/ArcAMI.cs
index 7def95b2..f4bd4b6d 100644
--- a/ArcFormats/Amaterasu/ArcAMI.cs
+++ b/ArcFormats/Amaterasu/ArcAMI.cs
@@ -179,7 +179,7 @@ namespace GameRes.Formats.Amaterasu
                 var file_table = new SortedDictionary<uint, PackedEntry>();
                 if (null != base_archive)
                 {
-                    foreach (var entry in base_archive.Dir.Cast<AmiEntry>())
+                    foreach (AmiEntry entry in base_archive.Dir)
                         file_table[entry.Id] = entry;
                 }
                 int update_count = UpdateFileTable (file_table, list);
diff --git a/ArcFormats/Ankh/ArcGRP.cs b/ArcFormats/Ankh/ArcGRP.cs
index 5748df0c..e1dcf007 100644
--- a/ArcFormats/Ankh/ArcGRP.cs
+++ b/ArcFormats/Ankh/ArcGRP.cs
@@ -27,7 +27,6 @@ using System;
 using System.Collections.Generic;
 using System.ComponentModel.Composition;
 using System.IO;
-using System.Linq;
 using GameRes.Utility;
 
 namespace GameRes.Formats.Ankh
@@ -78,7 +77,7 @@ namespace GameRes.Formats.Ankh
             }
             if (0 == dir.Count)
                 return null;
-            foreach (var entry in dir.Cast<PackedEntry>())
+            foreach (PackedEntry entry in dir)
             {
                 if (entry.Size < 4)
                     continue;
diff --git a/ArcFormats/ArcAil.cs b/ArcFormats/ArcAil.cs
index 5411559b..797c99aa 100644
--- a/ArcFormats/ArcAil.cs
+++ b/ArcFormats/ArcAil.cs
@@ -79,7 +79,7 @@ namespace GameRes.Formats.Ail
                 return null;
             byte[] preview = new byte[16];
             byte[] sign_buf = new byte[4];
-            foreach (var entry in dir.Cast<PackedEntry>())
+            foreach (PackedEntry entry in dir)
             {
                 uint extra = 6;
                 if (extra > entry.Size)
diff --git a/ArcFormats/Propeller/ArcMGR.cs b/ArcFormats/Propeller/ArcMGR.cs
index c99752c9..3849f754 100644
--- a/ArcFormats/Propeller/ArcMGR.cs
+++ b/ArcFormats/Propeller/ArcMGR.cs
@@ -27,7 +27,6 @@ using System;
 using System.Collections.Generic;
 using System.ComponentModel.Composition;
 using System.IO;
-using System.Linq;
 using GameRes.Utility;
 
 namespace GameRes.Formats.Propeller
@@ -79,7 +78,7 @@ namespace GameRes.Formats.Propeller
             {
                 dir.Add (new PackedEntry { Name = base_name+".bmp", Type = "image", Offset = current });
             }
-            foreach (var entry in dir.Cast<PackedEntry>())
+            foreach (PackedEntry entry in dir)
             {
                 entry.UnpackedSize  = file.View.ReadUInt32 (entry.Offset);
                 entry.Size          = file.View.ReadUInt32 (entry.Offset+4);
diff --git a/ArcFormats/SHSystem/ArcHXP.cs b/ArcFormats/SHSystem/ArcHXP.cs
index 66c9f0b8..8d9e2e24 100644
--- a/ArcFormats/SHSystem/ArcHXP.cs
+++ b/ArcFormats/SHSystem/ArcHXP.cs
@@ -77,7 +77,7 @@ namespace GameRes.Formats.SHSystem
         static protected void DetectFileTypes (ArcView file, List<Entry> dir)
         {
             byte[] signature_buffer = new byte[4];
-            foreach (var entry in dir.Cast<PackedEntry>())
+            foreach (PackedEntry entry in dir)
             {
                 uint packed_size   = file.View.ReadUInt32 (entry.Offset);
                 uint unpacked_size = file.View.ReadUInt32 (entry.Offset+4);
diff --git a/ArcFormats/Yuka/ArcYKC.cs b/ArcFormats/Yuka/ArcYKC.cs
index 8fae5c1c..eafd176d 100644
--- a/ArcFormats/Yuka/ArcYKC.cs
+++ b/ArcFormats/Yuka/ArcYKC.cs
@@ -79,7 +79,7 @@ namespace GameRes.Formats.Yuka
                 index_offset += 0x14;
             }
             // read in two cycles to avoid memory mapped file page switching when accessing names
-            foreach (var entry in dir.Cast<YukaEntry>())
+            foreach (YukaEntry entry in dir)
             {
                 entry.Name = file.View.ReadString (entry.NameOffset, entry.NameLength);
                 entry.Type = FormatCatalog.Instance.GetTypeFromName (entry.Name);
diff --git a/ArcFormats/Zyx/ArcBDF.cs b/ArcFormats/Zyx/ArcBDF.cs
index 734dc998..c392d11b 100644
--- a/ArcFormats/Zyx/ArcBDF.cs
+++ b/ArcFormats/Zyx/ArcBDF.cs
@@ -73,7 +73,7 @@ namespace GameRes.Formats.Zyx
                 }
                 pixels = FirstFrame.Clone() as byte[];
                 int i = 1;
-                foreach (var entry in Dir.Skip(1).Cast<BdfFrame>())
+                foreach (BdfFrame entry in Dir.Skip(1))
                 {
                     if (i++ > frame.Number)
                         break;