fix new dotnet api quirks

Author: neptuwunium

TACTLib/Container/ContainerHandler.cs

@@ -193,7 +193,7 @@ private unsafe ArraySegment<byte> OpenIndexEntry(IndexEntry indexEntry)
                 return buffer;
             }
 
-            ref var fileHeader = ref MemoryMarshal.AsRef<DataHeader>(buffer);
+            ref var fileHeader = ref MemoryMarshal.AsRef<DataHeader>(buffer.AsSpan());
             if (fileHeader.m_size != indexEntry.EncodedSize) {
                 // header struct: https://github.com/ladislav-zezula/CascLib/blob/22b558e710d730edaa7b1610349081fce7fb0f7a/src/CascStructs.h#L244
 

TACTLib/Core/Product/Tank/ProductHandler_Tank.cs

@@ -49,7 +49,7 @@ public Asset(int packageIdx, int recordIdx) {
         public const string TEXT_MANIFEST_NAME = "text";
 
         public static string? GetManifestLocale(string name) {
-            var tag = name.Split('_').Reverse().SingleOrDefault(v => v[0] == 'L' && v.Length >= 4);
+            var tag = Enumerable.Reverse(name.Split('_')).SingleOrDefault(v => v[0] == 'L' && v.Length >= 4);
             return tag?.Substring(1);
         }
 
@@ -69,7 +69,7 @@ public ProductHandler_Tank(ClientHandler client, Stream stream) {
 
             var totalAssetCount = 0;
 
-            foreach (var rootFile in m_rootFiles.Reverse()) { // cmf first, then apm
+            foreach (var rootFile in Enumerable.Reverse(m_rootFiles)) { // cmf first, then apm
                 var extension = Path.GetExtension(rootFile.FileName!);
                 if (extension != ".cmf" && extension != ".apm" && extension != ".trg") {
                     // not a manifest
@@ -302,4 +302,4 @@ record = m_packageManifest!.m_packageRecords[asset.m_packageIdx][asset.m_recordI
             };
         }
     }
-}
+}