diff --git a/src/SharpCompress/Common/Rar/AsyncMarkingBinaryReader.cs b/src/SharpCompress/Common/Rar/AsyncMarkingBinaryReader.cs
index fc5bd9cf..57837f84 100644
--- a/src/SharpCompress/Common/Rar/AsyncMarkingBinaryReader.cs
+++ b/src/SharpCompress/Common/Rar/AsyncMarkingBinaryReader.cs
@@ -47,14 +47,12 @@ internal class AsyncMarkingBinaryReader
 
     public async ValueTask<ushort> ReadUInt16Async(CancellationToken cancellationToken = default)
     {
-        CurrentReadByteCount += 2;
         var bytes = await ReadBytesAsync(2, cancellationToken).ConfigureAwait(false);
         return BinaryPrimitives.ReadUInt16LittleEndian(bytes);
     }
 
     public async ValueTask<uint> ReadUInt32Async(CancellationToken cancellationToken = default)
     {
-        CurrentReadByteCount += 4;
         var bytes = await ReadBytesAsync(4, cancellationToken).ConfigureAwait(false);
         return BinaryPrimitives.ReadUInt32LittleEndian(bytes);
     }
@@ -63,7 +61,6 @@ internal class AsyncMarkingBinaryReader
         CancellationToken cancellationToken = default
     )
     {
-        CurrentReadByteCount += 8;
         var bytes = await ReadBytesAsync(8, cancellationToken).ConfigureAwait(false);
         return BinaryPrimitives.ReadUInt64LittleEndian(bytes);
     }
@@ -72,7 +69,6 @@ internal class AsyncMarkingBinaryReader
         CancellationToken cancellationToken = default
     )
     {
-        CurrentReadByteCount += 2;
         var bytes = await ReadBytesAsync(2, cancellationToken).ConfigureAwait(false);
         return BinaryPrimitives.ReadInt16LittleEndian(bytes);
     }
@@ -81,7 +77,6 @@ internal class AsyncMarkingBinaryReader
         CancellationToken cancellationToken = default
     )
     {
-        CurrentReadByteCount += 4;
         var bytes = await ReadBytesAsync(4, cancellationToken).ConfigureAwait(false);
         return BinaryPrimitives.ReadInt32LittleEndian(bytes);
     }
@@ -90,7 +85,6 @@ internal class AsyncMarkingBinaryReader
         CancellationToken cancellationToken = default
     )
     {
-        CurrentReadByteCount += 8;
         var bytes = await ReadBytesAsync(8, cancellationToken).ConfigureAwait(false);
         return BinaryPrimitives.ReadInt64LittleEndian(bytes);
     }
diff --git a/src/SharpCompress/Common/Rar/Headers/FileHeader.Async.cs b/src/SharpCompress/Common/Rar/Headers/FileHeader.Async.cs
index 845da53f..f753eb03 100644
--- a/src/SharpCompress/Common/Rar/Headers/FileHeader.Async.cs
+++ b/src/SharpCompress/Common/Rar/Headers/FileHeader.Async.cs
@@ -119,7 +119,9 @@ internal partial class FileHeader
             {
                 case FHEXTRA_CRYPT:
                     {
-                        Rar5CryptoInfo = await Rar5CryptoInfo.CreateAsync(reader, true);
+                        Rar5CryptoInfo = await Rar5CryptoInfo
+                            .CreateAsync(reader, true)
+                            .ConfigureAwait(false);
                         if (Rar5CryptoInfo.PswCheck.All(singleByte => singleByte == 0))
                         {
                             Rar5CryptoInfo = null;
diff --git a/src/SharpCompress/Common/Zip/StreamingZipHeaderFactory.Async.cs b/src/SharpCompress/Common/Zip/StreamingZipHeaderFactory.Async.cs
index c36687c9..126e855a 100644
--- a/src/SharpCompress/Common/Zip/StreamingZipHeaderFactory.Async.cs
+++ b/src/SharpCompress/Common/Zip/StreamingZipHeaderFactory.Async.cs
@@ -72,7 +72,7 @@ internal sealed partial class StreamingZipHeaderFactory
         )
         {
             _headerFactory = headerFactory;
-            _rewindableStream = RewindableStream.EnsureSeekable(stream);
+            _rewindableStream = new RewindableStream(stream);
             _reader = new AsyncBinaryReader(_rewindableStream, leaveOpen: true);
             _cancellationToken = cancellationToken;
         }
diff --git a/tests/SharpCompress.Test/BinaryReaderParityTests.cs b/tests/SharpCompress.Test/BinaryReaderParityTests.cs
new file mode 100644
index 00000000..72a7f166
--- /dev/null
+++ b/tests/SharpCompress.Test/BinaryReaderParityTests.cs
@@ -0,0 +1,188 @@
+using System;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using SharpCompress.Common;
+using SharpCompress.IO;
+using Xunit;
+
+namespace SharpCompress.Test;
+
+public class BinaryReaderParityTests : TestBase
+{
+    private readonly byte[] _testData;
+
+    public BinaryReaderParityTests()
+    {
+        // Create test data with various patterns
+        _testData = new byte[256];
+        for (int i = 0; i < 256; i++)
+        {
+            _testData[i] = (byte)i;
+        }
+    }
+
+    [Fact]
+    public async Task ReadByte_Parity()
+    {
+        using var syncStream = new MemoryStream(_testData);
+        using var asyncStream = new MemoryStream(_testData);
+        using var syncReader = new BinaryReader(syncStream);
+        using var asyncReader = new AsyncBinaryReader(asyncStream);
+
+        for (int i = 0; i < 10; i++)
+        {
+            byte syncByte = syncReader.ReadByte();
+            byte asyncByte = await asyncReader.ReadByteAsync();
+            Assert.Equal(syncByte, asyncByte);
+        }
+    }
+
+    [Fact]
+    public async Task ReadBytes_Parity()
+    {
+        using var syncStream = new MemoryStream(_testData);
+        using var asyncStream = new MemoryStream(_testData);
+        using var syncReader = new BinaryReader(syncStream);
+        using var asyncReader = new AsyncBinaryReader(asyncStream);
+
+        var syncBytes = syncReader.ReadBytes(32);
+        var asyncBuffer = new byte[32];
+        await asyncReader.ReadBytesAsync(asyncBuffer, 0, 32);
+
+        Assert.Equal(syncBytes, asyncBuffer);
+    }
+
+    [Fact]
+    public async Task ReadUInt16_Parity()
+    {
+        using var syncStream = new MemoryStream(_testData);
+        using var asyncStream = new MemoryStream(_testData);
+        using var syncReader = new BinaryReader(syncStream);
+        using var asyncReader = new AsyncBinaryReader(asyncStream);
+
+        ushort syncValue = syncReader.ReadUInt16();
+        ushort asyncValue = await asyncReader.ReadUInt16Async();
+
+        Assert.Equal(syncValue, asyncValue);
+    }
+
+    [Fact]
+    public async Task ReadUInt32_Parity()
+    {
+        using var syncStream = new MemoryStream(_testData);
+        using var asyncStream = new MemoryStream(_testData);
+        using var syncReader = new BinaryReader(syncStream);
+        using var asyncReader = new AsyncBinaryReader(asyncStream);
+
+        uint syncValue = syncReader.ReadUInt32();
+        uint asyncValue = await asyncReader.ReadUInt32Async();
+
+        Assert.Equal(syncValue, asyncValue);
+    }
+
+    [Fact]
+    public async Task ReadUInt64_Parity()
+    {
+        using var syncStream = new MemoryStream(_testData);
+        using var asyncStream = new MemoryStream(_testData);
+        using var syncReader = new BinaryReader(syncStream);
+        using var asyncReader = new AsyncBinaryReader(asyncStream);
+
+        ulong syncValue = syncReader.ReadUInt64();
+        ulong asyncValue = await asyncReader.ReadUInt64Async();
+
+        Assert.Equal(syncValue, asyncValue);
+    }
+
+    [Fact]
+    public void Position_Parity()
+    {
+        using var syncStream = new MemoryStream(_testData);
+        using var asyncStream = new MemoryStream(_testData);
+        using var syncReader = new BinaryReader(syncStream);
+        using var asyncReader = new AsyncBinaryReader(asyncStream);
+
+        // Read some bytes
+        syncReader.ReadBytes(10);
+        var asyncBuffer = new byte[10];
+        asyncReader.ReadBytesAsync(asyncBuffer, 0, 10).AsTask().Wait();
+
+        Assert.Equal(syncStream.Position, asyncStream.Position);
+        Assert.Equal(syncReader.BaseStream.Position, asyncReader.BaseStream.Position);
+    }
+
+    [Fact]
+    public async Task MultipleReads_Parity()
+    {
+        using var syncStream = new MemoryStream(_testData);
+        using var asyncStream = new MemoryStream(_testData);
+        using var syncReader = new BinaryReader(syncStream);
+        using var asyncReader = new AsyncBinaryReader(asyncStream);
+
+        // Mix of different read operations
+        Assert.Equal(syncReader.ReadByte(), await asyncReader.ReadByteAsync());
+
+        var syncBytes = new byte[16];
+        var asyncBytes = new byte[16];
+        syncStream.Read(syncBytes, 0, 16);
+        await asyncReader.ReadBytesAsync(asyncBytes, 0, 16);
+        Assert.Equal(syncBytes, asyncBytes);
+
+        Assert.Equal(syncReader.ReadUInt16(), await asyncReader.ReadUInt16Async());
+        Assert.Equal(syncReader.ReadUInt32(), await asyncReader.ReadUInt32Async());
+        Assert.Equal(syncReader.ReadUInt64(), await asyncReader.ReadUInt64Async());
+    }
+
+    [Fact]
+    public async Task ReadByte_Async_Properly_Async()
+    {
+        using var stream = new MemoryStream(_testData);
+        using var reader = new AsyncBinaryReader(stream);
+
+        var bytes = new byte[10];
+        for (int i = 0; i < 10; i++)
+        {
+            bytes[i] = await reader.ReadByteAsync();
+        }
+
+        Assert.Equal(_testData.Take(10).ToArray(), bytes);
+    }
+
+    [Fact]
+    public async Task ReadBytes_Async_Properly_Async()
+    {
+        using var stream = new MemoryStream(_testData);
+        using var reader = new AsyncBinaryReader(stream);
+
+        var buffer = new byte[64];
+        await reader.ReadBytesAsync(buffer, 0, 64);
+
+        Assert.Equal(_testData.Take(64).ToArray(), buffer);
+    }
+
+    [Fact]
+    public async Task SkipAsync_Moves_Position_Correctly()
+    {
+        using var stream = new MemoryStream(_testData);
+        using var reader = new AsyncBinaryReader(stream);
+
+        await reader.SkipAsync(10);
+
+        Assert.Equal(10, stream.Position);
+        Assert.Equal(10, reader.BaseStream.Position);
+    }
+
+    [Fact]
+    public async Task SkipAsync_Then_Read_Works_Correctly()
+    {
+        using var stream = new MemoryStream(_testData);
+        using var reader = new AsyncBinaryReader(stream);
+
+        await reader.SkipAsync(10);
+        byte b = await reader.ReadByteAsync();
+
+        Assert.Equal(_testData[10], b);
+    }
+}
diff --git a/tests/SharpCompress.Test/MarkingBinaryReaderParityTests.cs b/tests/SharpCompress.Test/MarkingBinaryReaderParityTests.cs
new file mode 100644
index 00000000..5dfeb5b8
--- /dev/null
+++ b/tests/SharpCompress.Test/MarkingBinaryReaderParityTests.cs
@@ -0,0 +1,258 @@
+using System;
+using System.IO;
+using System.Linq;
+using System.Threading.Tasks;
+using SharpCompress.Common.Rar;
+using SharpCompress.IO;
+using Xunit;
+
+namespace SharpCompress.Test;
+
+public class MarkingBinaryReaderParityTests : TestBase
+{
+    private readonly byte[] _testData;
+
+    public MarkingBinaryReaderParityTests()
+    {
+        // Create test data with various patterns
+        _testData = new byte[256];
+        for (int i = 0; i < 256; i++)
+        {
+            _testData[i] = (byte)i;
+        }
+    }
+
+    [Fact]
+    public void Mark_Resets_ByteCount()
+    {
+        using var stream = new MemoryStream(_testData);
+        var reader = new MarkingBinaryReader(stream);
+
+        reader.ReadBytes(10);
+        Assert.Equal(10, reader.CurrentReadByteCount);
+
+        reader.Mark();
+        Assert.Equal(0, reader.CurrentReadByteCount);
+
+        reader.ReadBytes(5);
+        Assert.Equal(5, reader.CurrentReadByteCount);
+    }
+
+    [Fact]
+    public async Task Mark_Resets_ByteCount_Async()
+    {
+        using var stream = new MemoryStream(_testData);
+        var reader = new AsyncMarkingBinaryReader(stream);
+
+        await reader.ReadBytesAsync(10);
+        Assert.Equal(10, reader.CurrentReadByteCount);
+
+        reader.Mark();
+        Assert.Equal(0, reader.CurrentReadByteCount);
+
+        await reader.ReadBytesAsync(5);
+        Assert.Equal(5, reader.CurrentReadByteCount);
+    }
+
+    [Fact]
+    public void ReadByte_Updates_ByteCount()
+    {
+        using var stream = new MemoryStream(_testData);
+        var reader = new MarkingBinaryReader(stream);
+
+        reader.Mark();
+        reader.ReadByte();
+        Assert.Equal(1, reader.CurrentReadByteCount);
+
+        reader.ReadByte();
+        Assert.Equal(2, reader.CurrentReadByteCount);
+    }
+
+    [Fact]
+    public async Task ReadByte_Updates_ByteCount_Async()
+    {
+        using var stream = new MemoryStream(_testData);
+        var reader = new AsyncMarkingBinaryReader(stream);
+
+        reader.Mark();
+        await reader.ReadByteAsync();
+        Assert.Equal(1, reader.CurrentReadByteCount);
+
+        await reader.ReadByteAsync();
+        Assert.Equal(2, reader.CurrentReadByteCount);
+    }
+
+    [Fact]
+    public void ReadBytes_Updates_ByteCount()
+    {
+        using var stream = new MemoryStream(_testData);
+        var reader = new MarkingBinaryReader(stream);
+
+        reader.Mark();
+        reader.ReadBytes(16);
+        Assert.Equal(16, reader.CurrentReadByteCount);
+
+        reader.ReadBytes(8);
+        Assert.Equal(24, reader.CurrentReadByteCount);
+    }
+
+    [Fact]
+    public async Task ReadBytes_Updates_ByteCount_Async()
+    {
+        using var stream = new MemoryStream(_testData);
+        var reader = new AsyncMarkingBinaryReader(stream);
+
+        reader.Mark();
+        await reader.ReadBytesAsync(16);
+        Assert.Equal(16, reader.CurrentReadByteCount);
+
+        await reader.ReadBytesAsync(8);
+        Assert.Equal(24, reader.CurrentReadByteCount);
+    }
+
+    [Fact]
+    public void ReadUInt16_Updates_ByteCount()
+    {
+        using var stream = new MemoryStream(_testData);
+        var reader = new MarkingBinaryReader(stream);
+
+        reader.Mark();
+        reader.ReadUInt16();
+        Assert.Equal(2, reader.CurrentReadByteCount);
+    }
+
+    [Fact]
+    public async Task ReadUInt16_Updates_ByteCount_Async()
+    {
+        using var stream = new MemoryStream(_testData);
+        var reader = new AsyncMarkingBinaryReader(stream);
+
+        reader.Mark();
+        await reader.ReadUInt16Async();
+        Assert.Equal(2, reader.CurrentReadByteCount);
+    }
+
+    [Fact]
+    public void ReadUInt32_Updates_ByteCount()
+    {
+        using var stream = new MemoryStream(_testData);
+        var reader = new MarkingBinaryReader(stream);
+
+        reader.Mark();
+        reader.ReadUInt32();
+        Assert.Equal(4, reader.CurrentReadByteCount);
+    }
+
+    [Fact]
+    public async Task ReadUInt32_Updates_ByteCount_Async()
+    {
+        using var stream = new MemoryStream(_testData);
+        var reader = new AsyncMarkingBinaryReader(stream);
+
+        reader.Mark();
+        await reader.ReadUInt32Async();
+        Assert.Equal(4, reader.CurrentReadByteCount);
+    }
+
+    [Fact]
+    public void ReadRarVInt_Updates_ByteCount()
+    {
+        // Create valid RAR v-int data: 0x05 (value 5, no continuation bit)
+        var data = new byte[] { 0x05, 0x85, 0x01, 0x00 }; // 0x05, then 0x85 0x01 (value 5 + 128 = 133)
+        using var stream = new MemoryStream(data);
+        var reader = new MarkingBinaryReader(stream);
+
+        reader.Mark();
+        // Read a single-byte v-int (value 5, no continuation bit)
+        reader.ReadRarVInt();
+        Assert.Equal(1, reader.CurrentReadByteCount);
+
+        reader.Mark();
+        // Read a two-byte v-int (0x85 means continuation, then 0x01)
+        reader.ReadRarVInt();
+        Assert.Equal(2, reader.CurrentReadByteCount);
+    }
+
+    [Fact]
+    public async Task ReadRarVInt_Updates_ByteCount_Async()
+    {
+        // Create valid RAR v-int data: 0x05 (value 5, no continuation bit)
+        var data = new byte[] { 0x05, 0x85, 0x01, 0x00 };
+        using var stream = new MemoryStream(data);
+        var reader = new AsyncMarkingBinaryReader(stream);
+
+        reader.Mark();
+        // Read a single-byte v-int (value 5, no continuation bit)
+        await reader.ReadRarVIntAsync();
+        Assert.Equal(1, reader.CurrentReadByteCount);
+
+        reader.Mark();
+        // Read a two-byte v-int (0x85 means continuation, then 0x01)
+        await reader.ReadRarVIntAsync();
+        Assert.Equal(2, reader.CurrentReadByteCount);
+    }
+
+    [Fact]
+    public async Task Sync_Async_ByteCount_Parity()
+    {
+        using var syncStream = new MemoryStream(_testData);
+        using var asyncStream = new MemoryStream(_testData);
+        var syncReader = new MarkingBinaryReader(syncStream);
+        var asyncReader = new AsyncMarkingBinaryReader(asyncStream);
+
+        syncReader.Mark();
+        asyncReader.Mark();
+
+        // Read bytes with sync
+        syncReader.ReadByte();
+        syncReader.ReadByte();
+        syncReader.ReadUInt16();
+        syncReader.ReadUInt32();
+        syncReader.ReadBytes(8);
+        var syncCount = syncReader.CurrentReadByteCount;
+
+        // Read bytes with async
+        await asyncReader.ReadByteAsync();
+        await asyncReader.ReadByteAsync();
+        await asyncReader.ReadUInt16Async();
+        await asyncReader.ReadUInt32Async();
+        await asyncReader.ReadBytesAsync(8);
+        var asyncCount = asyncReader.CurrentReadByteCount;
+
+        Assert.Equal(syncCount, asyncCount);
+        Assert.Equal(16, syncCount);
+        Assert.Equal(16, asyncCount);
+    }
+
+    [Fact]
+    public async Task Sync_Async_ByteCount_Parity_Alt()
+    {
+        using var syncStream = new MemoryStream(_testData);
+        using var asyncStream = new MemoryStream(_testData);
+        var syncReader = new MarkingBinaryReader(syncStream);
+        var asyncReader = new AsyncMarkingBinaryReader(asyncStream);
+
+        syncReader.Mark();
+        asyncReader.Mark();
+
+        // Read bytes with sync
+        syncReader.ReadByte();
+        syncReader.ReadByte();
+        syncReader.ReadUInt16();
+        syncReader.ReadUInt32();
+        syncReader.ReadBytes(8);
+        var syncCount = syncReader.CurrentReadByteCount;
+
+        // Read bytes with async
+        await asyncReader.ReadByteAsync();
+        await asyncReader.ReadByteAsync();
+        await asyncReader.ReadUInt16Async();
+        await asyncReader.ReadUInt32Async();
+        await asyncReader.ReadBytesAsync(8);
+        var asyncCount = asyncReader.CurrentReadByteCount;
+
+        Assert.Equal(syncCount, asyncCount);
+        Assert.Equal(16, syncCount);
+        Assert.Equal(16, asyncCount);
+    }
+}