Address code review feedback: improve ReadResourceAsync and fix comments

Co-authored-by: Soar360 <[email protected]>

Author: Copilot

LuYao.ResourcePacker.Tests/ResourcePackageReaderThreadSafetyTests.cs

@@ -15,12 +15,12 @@ public class ResourcePackageReaderThreadSafetyTests : IDisposable
 
         public ResourcePackageReaderThreadSafetyTests()
         {
-            // 创建临时目录用于测试
+            // Create temporary directory for tests
             _tempDirectory = Path.Combine(Path.GetTempPath(), $"ResourcePackerThreadSafetyTests_{Guid.NewGuid()}");
             Directory.CreateDirectory(_tempDirectory);
             _outputPath = Path.Combine(_tempDirectory, "test.dat");
 
-            // 创建测试资源包
+            // Create test resource package
             var sourceDir = Path.Combine(Directory.GetCurrentDirectory(), "TestResources");
             var packer = new ResourcePacker(sourceDir, "*.res.*");
             packer.PackResources(_outputPath);
@@ -231,7 +231,7 @@ public void ConcurrentStreamReads_ShouldNotCorruptData()
 
         public void Dispose()
         {
-            // 清理临时目录
+            // Clean up temporary directory
             if (Directory.Exists(_tempDirectory))
             {
                 Directory.Delete(_tempDirectory, true);

LuYao.ResourcePacker/ResourcePackageReader.cs

@@ -84,7 +84,7 @@ public bool ContainsKey(string resourceKey)
         /// </summary>
         /// <param name="resourceKey">The key of the resource to read.</param>
         /// <returns>A task that represents the asynchronous read operation.</returns>
-        public async Task<byte[]> ReadResourceAsync(string resourceKey)
+        public Task<byte[]> ReadResourceAsync(string resourceKey)
         {
             if (_disposed)
                 throw new ObjectDisposedException(nameof(ResourcePackageReader));
@@ -98,10 +98,18 @@ public async Task<byte[]> ReadResourceAsync(string resourceKey)
             lock (_lock)
             {
                 _fileStream.Seek(entry.Offset, SeekOrigin.Begin);
-                _fileStream.Read(buffer, 0, buffer.Length);
+                
+                int totalRead = 0;
+                while (totalRead < entry.Length)
+                {
+                    int bytesRead = _fileStream.Read(buffer, totalRead, entry.Length - totalRead);
+                    if (bytesRead == 0)
+                        throw new EndOfStreamException($"Unexpected end of stream while reading resource '{resourceKey}'.");
+                    totalRead += bytesRead;
+                }
             }
 
-            return await Task.FromResult(buffer);
+            return Task.FromResult(buffer);
         }
 
         /// <summary>