diff --git a/src/SharpCompress/Algorithms/Adler32.cs b/src/SharpCompress/Algorithms/Adler32.cs
index f7ea0eb35..d76453270 100644
--- a/src/SharpCompress/Algorithms/Adler32.cs
+++ b/src/SharpCompress/Algorithms/Adler32.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors.
 // Licensed under the Apache License, Version 2.0.
 
-#if !NETSTANDARD2_0 && !NETSTANDARD2_1 && !NETFRAMEWORK
+#if !LEGACY_DOTNET
 #define SUPPORTS_RUNTIME_INTRINSICS
 #define SUPPORTS_HOTPATH
 #endif
diff --git a/src/SharpCompress/Archives/SevenZip/SevenZipArchive.cs b/src/SharpCompress/Archives/SevenZip/SevenZipArchive.cs
index e6b511d83..328d5e33c 100644
--- a/src/SharpCompress/Archives/SevenZip/SevenZipArchive.cs
+++ b/src/SharpCompress/Archives/SevenZip/SevenZipArchive.cs
@@ -184,7 +184,7 @@ public override Task FlushAsync(CancellationToken cancellationToken)
             return Task.CompletedTask;
         }
 
-#if !NETFRAMEWORK && !NETSTANDARD2_0
+#if !LEGACY_DOTNET
         public override ValueTask<int> ReadAsync(
             Memory<byte> buffer,
             CancellationToken cancellationToken = default
diff --git a/src/SharpCompress/Common/AsyncBinaryReader.cs b/src/SharpCompress/Common/AsyncBinaryReader.cs
index 8c5327aea..f2cdb4a65 100644
--- a/src/SharpCompress/Common/AsyncBinaryReader.cs
+++ b/src/SharpCompress/Common/AsyncBinaryReader.cs
@@ -82,7 +82,7 @@ public void Dispose()
             }
         }
 
-#if NET6_0_OR_GREATER
+#if NET8_0_OR_GREATER
         public async ValueTask DisposeAsync()
         {
             if (_disposed)
diff --git a/src/SharpCompress/Common/EntryStream.cs b/src/SharpCompress/Common/EntryStream.cs
index 11d0e898f..e4de4ca9a 100644
--- a/src/SharpCompress/Common/EntryStream.cs
+++ b/src/SharpCompress/Common/EntryStream.cs
@@ -93,7 +93,7 @@ protected override void Dispose(bool disposing)
         _stream.Dispose();
     }
 
-#if !NETFRAMEWORK && !NETSTANDARD2_0
+#if !LEGACY_DOTNET
     public override async ValueTask DisposeAsync()
     {
         if (_isDisposed)
@@ -171,7 +171,7 @@ CancellationToken cancellationToken
         return read;
     }
 
-#if !NETFRAMEWORK && !NETSTANDARD2_0
+#if !LEGACY_DOTNET
     public override async ValueTask<int> ReadAsync(
         Memory<byte> buffer,
         CancellationToken cancellationToken = default
diff --git a/src/SharpCompress/Common/Tar/TarReadOnlySubStream.cs b/src/SharpCompress/Common/Tar/TarReadOnlySubStream.cs
index 4e6ddb700..9a91ba9c5 100644
--- a/src/SharpCompress/Common/Tar/TarReadOnlySubStream.cs
+++ b/src/SharpCompress/Common/Tar/TarReadOnlySubStream.cs
@@ -66,7 +66,7 @@ protected override void Dispose(bool disposing)
         base.Dispose(disposing);
     }
 
-#if !NETFRAMEWORK && !NETSTANDARD2_0
+#if !LEGACY_DOTNET
     public override async System.Threading.Tasks.ValueTask DisposeAsync()
     {
         if (_isDisposed)
@@ -170,7 +170,7 @@ System.Threading.CancellationToken cancellationToken
         return read;
     }
 
-#if !NETFRAMEWORK && !NETSTANDARD2_0
+#if !LEGACY_DOTNET
     public override async System.Threading.Tasks.ValueTask<int> ReadAsync(
         System.Memory<byte> buffer,
         System.Threading.CancellationToken cancellationToken = default
diff --git a/src/SharpCompress/Common/Zip/WinzipAesEncryptionData.cs b/src/SharpCompress/Common/Zip/WinzipAesEncryptionData.cs
index da37501b9..9925c5934 100644
--- a/src/SharpCompress/Common/Zip/WinzipAesEncryptionData.cs
+++ b/src/SharpCompress/Common/Zip/WinzipAesEncryptionData.cs
@@ -20,7 +20,7 @@ string password
     {
         _keySize = keySize;
 
-#if NETFRAMEWORK || NETSTANDARD2_0
+#if LEGACY_DOTNET
         var rfc2898 = new Rfc2898DeriveBytes(password, salt, RFC2898_ITERATIONS);
         KeyBytes = rfc2898.GetBytes(KeySizeInBytes);
         IvBytes = rfc2898.GetBytes(KeySizeInBytes);
diff --git a/src/SharpCompress/Compressors/BZip2/BZip2Stream.cs b/src/SharpCompress/Compressors/BZip2/BZip2Stream.cs
index e3325f279..898839bc0 100644
--- a/src/SharpCompress/Compressors/BZip2/BZip2Stream.cs
+++ b/src/SharpCompress/Compressors/BZip2/BZip2Stream.cs
@@ -98,7 +98,7 @@ public override int Read(byte[] buffer, int offset, int count) =>
 
     public override void SetLength(long value) => stream.SetLength(value);
 
-#if !NETFRAMEWORK && !NETSTANDARD2_0
+#if !LEGACY_DOTNET
 
     public override int Read(Span<byte> buffer) => stream.Read(buffer);
 
diff --git a/src/SharpCompress/Compressors/Deflate/DeflateStream.cs b/src/SharpCompress/Compressors/Deflate/DeflateStream.cs
index 55c24813d..f11ea41b9 100644
--- a/src/SharpCompress/Compressors/Deflate/DeflateStream.cs
+++ b/src/SharpCompress/Compressors/Deflate/DeflateStream.cs
@@ -299,7 +299,7 @@ public override async Task FlushAsync(CancellationToken cancellationToken)
         await _baseStream.FlushAsync(cancellationToken).ConfigureAwait(false);
     }
 
-#if !NETFRAMEWORK && !NETSTANDARD2_0
+#if !LEGACY_DOTNET
     public override async ValueTask DisposeAsync()
     {
         if (_disposed)
@@ -370,7 +370,7 @@ CancellationToken cancellationToken
             .ConfigureAwait(false);
     }
 
-#if !NETFRAMEWORK && !NETSTANDARD2_0
+#if !LEGACY_DOTNET
     public override async ValueTask<int> ReadAsync(
         Memory<byte> buffer,
         CancellationToken cancellationToken = default
@@ -461,7 +461,7 @@ await _baseStream
             .ConfigureAwait(false);
     }
 
-#if !NETFRAMEWORK && !NETSTANDARD2_0
+#if !LEGACY_DOTNET
     public override async ValueTask WriteAsync(
         ReadOnlyMemory<byte> buffer,
         CancellationToken cancellationToken = default
diff --git a/src/SharpCompress/Compressors/Deflate/GZipStream.cs b/src/SharpCompress/Compressors/Deflate/GZipStream.cs
index d9af42841..aceacb289 100644
--- a/src/SharpCompress/Compressors/Deflate/GZipStream.cs
+++ b/src/SharpCompress/Compressors/Deflate/GZipStream.cs
@@ -345,7 +345,7 @@ CancellationToken cancellationToken
         return n;
     }
 
-#if !NETFRAMEWORK && !NETSTANDARD2_0
+#if !LEGACY_DOTNET
     public override async ValueTask<int> ReadAsync(
         Memory<byte> buffer,
         CancellationToken cancellationToken = default
@@ -454,7 +454,7 @@ CancellationToken cancellationToken
         await BaseStream.WriteAsync(buffer, offset, count, cancellationToken).ConfigureAwait(false);
     }
 
-#if !NETFRAMEWORK && !NETSTANDARD2_0
+#if !LEGACY_DOTNET
     public override async ValueTask WriteAsync(
         ReadOnlyMemory<byte> buffer,
         CancellationToken cancellationToken = default
diff --git a/src/SharpCompress/Compressors/Deflate/ZlibBaseStream.cs b/src/SharpCompress/Compressors/Deflate/ZlibBaseStream.cs
index d3c10f9b7..dd6590b71 100644
--- a/src/SharpCompress/Compressors/Deflate/ZlibBaseStream.cs
+++ b/src/SharpCompress/Compressors/Deflate/ZlibBaseStream.cs
@@ -552,7 +552,7 @@ protected override void Dispose(bool disposing)
         }
     }
 
-#if !NETFRAMEWORK && !NETSTANDARD2_0
+#if !LEGACY_DOTNET
     public override async ValueTask DisposeAsync()
     {
         if (isDisposed)
@@ -1171,7 +1171,7 @@ CancellationToken cancellationToken
         return rc;
     }
 
-#if !NETFRAMEWORK && !NETSTANDARD2_0
+#if !LEGACY_DOTNET
     public override async ValueTask<int> ReadAsync(
         Memory<byte> buffer,
         CancellationToken cancellationToken = default
diff --git a/src/SharpCompress/Compressors/Deflate/ZlibConstants.cs b/src/SharpCompress/Compressors/Deflate/ZlibConstants.cs
index ec415d9ce..7bf8a3f6a 100644
--- a/src/SharpCompress/Compressors/Deflate/ZlibConstants.cs
+++ b/src/SharpCompress/Compressors/Deflate/ZlibConstants.cs
@@ -108,13 +108,9 @@ internal static class ZlibConstants
     public const int Z_BUF_ERROR = -5;
 
     /// <summary>
-    /// The size of the working buffer used in the ZlibCodec class. Defaults to 8192 bytes.
+    /// The size of the working buffer used in the ZlibCodec class. Defaults to 16384 bytes.
     /// </summary>
-#if NETCF
-    public const int WorkingBufferSizeDefault = 8192;
-#else
     public const int WorkingBufferSizeDefault = 16384;
-#endif
 
     /// <summary>
     /// The minimum size of the working buffer used in the ZlibCodec class.  Currently it is 128 bytes.
diff --git a/src/SharpCompress/Compressors/Deflate/ZlibStream.cs b/src/SharpCompress/Compressors/Deflate/ZlibStream.cs
index 3365832cc..d94ca210c 100644
--- a/src/SharpCompress/Compressors/Deflate/ZlibStream.cs
+++ b/src/SharpCompress/Compressors/Deflate/ZlibStream.cs
@@ -277,7 +277,7 @@ public override async Task FlushAsync(CancellationToken cancellationToken)
         await _baseStream.FlushAsync(cancellationToken).ConfigureAwait(false);
     }
 
-#if !NETFRAMEWORK && !NETSTANDARD2_0
+#if !LEGACY_DOTNET
     public override async ValueTask DisposeAsync()
     {
         if (_disposed)
@@ -347,7 +347,7 @@ CancellationToken cancellationToken
             .ConfigureAwait(false);
     }
 
-#if !NETFRAMEWORK && !NETSTANDARD2_0
+#if !LEGACY_DOTNET
     public override async ValueTask<int> ReadAsync(
         Memory<byte> buffer,
         CancellationToken cancellationToken = default
@@ -431,7 +431,7 @@ await _baseStream
             .ConfigureAwait(false);
     }
 
-#if !NETFRAMEWORK && !NETSTANDARD2_0
+#if !LEGACY_DOTNET
     public override async ValueTask WriteAsync(
         ReadOnlyMemory<byte> buffer,
         CancellationToken cancellationToken = default
diff --git a/src/SharpCompress/Compressors/Deflate64/Deflate64Stream.cs b/src/SharpCompress/Compressors/Deflate64/Deflate64Stream.cs
index 3ba9e618e..083f0380a 100644
--- a/src/SharpCompress/Compressors/Deflate64/Deflate64Stream.cs
+++ b/src/SharpCompress/Compressors/Deflate64/Deflate64Stream.cs
@@ -200,7 +200,7 @@ CancellationToken cancellationToken
         return count - remainingCount;
     }
 
-#if !NETFRAMEWORK && !NETSTANDARD2_0
+#if !LEGACY_DOTNET
     public override async ValueTask<int> ReadAsync(
         Memory<byte> buffer,
         CancellationToken cancellationToken = default
diff --git a/src/SharpCompress/Compressors/LZMA/LZipStream.cs b/src/SharpCompress/Compressors/LZMA/LZipStream.cs
index e409e39e6..ddf39e01b 100644
--- a/src/SharpCompress/Compressors/LZMA/LZipStream.cs
+++ b/src/SharpCompress/Compressors/LZMA/LZipStream.cs
@@ -163,7 +163,7 @@ public override int Read(byte[] buffer, int offset, int count) =>
 
     public override void SetLength(long value) => throw new NotImplementedException();
 
-#if !NETFRAMEWORK && !NETSTANDARD2_0
+#if !LEGACY_DOTNET
 
     public override ValueTask<int> ReadAsync(
         Memory<byte> buffer,
diff --git a/src/SharpCompress/Compressors/LZMA/LzmaDecoder.cs b/src/SharpCompress/Compressors/LZMA/LzmaDecoder.cs
index 95d3d027b..0fb39626f 100644
--- a/src/SharpCompress/Compressors/LZMA/LzmaDecoder.cs
+++ b/src/SharpCompress/Compressors/LZMA/LzmaDecoder.cs
@@ -201,7 +201,7 @@ public Decoder()
         }
     }
 
-#if !NETFRAMEWORK && !NETSTANDARD2_0
+#if !LEGACY_DOTNET
     [MemberNotNull(nameof(_outWindow))]
 #endif
     private void CreateDictionary()
diff --git a/src/SharpCompress/Compressors/LZMA/LzmaStream.cs b/src/SharpCompress/Compressors/LZMA/LzmaStream.cs
index 26079966c..1399c0bf7 100644
--- a/src/SharpCompress/Compressors/LZMA/LzmaStream.cs
+++ b/src/SharpCompress/Compressors/LZMA/LzmaStream.cs
@@ -632,7 +632,7 @@ await _decoder
         return total;
     }
 
-#if !NETFRAMEWORK && !NETSTANDARD2_0
+#if !LEGACY_DOTNET
     public override async ValueTask<int> ReadAsync(
         Memory<byte> buffer,
         CancellationToken cancellationToken = default
diff --git a/src/SharpCompress/Compressors/Rar/MultiVolumeReadOnlyStream.cs b/src/SharpCompress/Compressors/Rar/MultiVolumeReadOnlyStream.cs
index df1c59592..854b08853 100644
--- a/src/SharpCompress/Compressors/Rar/MultiVolumeReadOnlyStream.cs
+++ b/src/SharpCompress/Compressors/Rar/MultiVolumeReadOnlyStream.cs
@@ -185,7 +185,7 @@ System.Threading.CancellationToken cancellationToken
         return totalRead;
     }
 
-#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
+#if !LEGACY_DOTNET
     public override async System.Threading.Tasks.ValueTask<int> ReadAsync(
         Memory<byte> buffer,
         System.Threading.CancellationToken cancellationToken = default
diff --git a/src/SharpCompress/Compressors/Rar/RarBLAKE2spStream.cs b/src/SharpCompress/Compressors/Rar/RarBLAKE2spStream.cs
index 693d284bd..4ec3cf2cf 100644
--- a/src/SharpCompress/Compressors/Rar/RarBLAKE2spStream.cs
+++ b/src/SharpCompress/Compressors/Rar/RarBLAKE2spStream.cs
@@ -385,7 +385,7 @@ System.Threading.CancellationToken cancellationToken
         return result;
     }
 
-#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
+#if !LEGACY_DOTNET
     public override async System.Threading.Tasks.ValueTask<int> ReadAsync(
         Memory<byte> buffer,
         System.Threading.CancellationToken cancellationToken = default
diff --git a/src/SharpCompress/Compressors/Rar/RarCrcStream.cs b/src/SharpCompress/Compressors/Rar/RarCrcStream.cs
index 0ec0527dd..af866c177 100644
--- a/src/SharpCompress/Compressors/Rar/RarCrcStream.cs
+++ b/src/SharpCompress/Compressors/Rar/RarCrcStream.cs
@@ -129,7 +129,7 @@ System.Threading.CancellationToken cancellationToken
         return result;
     }
 
-#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
+#if !LEGACY_DOTNET
     public override async System.Threading.Tasks.ValueTask<int> ReadAsync(
         Memory<byte> buffer,
         System.Threading.CancellationToken cancellationToken = default
diff --git a/src/SharpCompress/Compressors/Rar/RarStream.cs b/src/SharpCompress/Compressors/Rar/RarStream.cs
index 21c225c3c..34700edf4 100644
--- a/src/SharpCompress/Compressors/Rar/RarStream.cs
+++ b/src/SharpCompress/Compressors/Rar/RarStream.cs
@@ -189,7 +189,7 @@ System.Threading.CancellationToken cancellationToken
         return outTotal;
     }
 
-#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
+#if !LEGACY_DOTNET
     public override async System.Threading.Tasks.ValueTask<int> ReadAsync(
         Memory<byte> buffer,
         System.Threading.CancellationToken cancellationToken = default
diff --git a/src/SharpCompress/Compressors/ZStandard/CompressionStream.cs b/src/SharpCompress/Compressors/ZStandard/CompressionStream.cs
index af8865b41..df4b4d687 100644
--- a/src/SharpCompress/Compressors/ZStandard/CompressionStream.cs
+++ b/src/SharpCompress/Compressors/ZStandard/CompressionStream.cs
@@ -74,7 +74,7 @@ public void LoadDictionary(byte[] dict)
 
     ~CompressionStream() => Dispose(false);
 
-#if !NETSTANDARD2_0 && !NETFRAMEWORK
+#if !LEGACY_DOTNET
     public override async ValueTask DisposeAsync()
 #else
     public async ValueTask DisposeAsync()
@@ -145,7 +145,7 @@ private async ValueTask FlushInternalAsync(
     public override void Write(byte[] buffer, int offset, int count) =>
         Write(new ReadOnlySpan<byte>(buffer, offset, count));
 
-#if !NETSTANDARD2_0 && !NETFRAMEWORK
+#if !LEGACY_DOTNET
     public override void Write(ReadOnlySpan<byte> buffer) =>
         WriteInternal(buffer, ZSTD_EndDirective.ZSTD_e_continue);
 #else
@@ -176,7 +176,7 @@ private void WriteInternal(ReadOnlySpan<byte> buffer, ZSTD_EndDirective directiv
         );
     }
 
-#if !NETSTANDARD2_0 && !NETFRAMEWORK
+#if !LEGACY_DOTNET
     private async ValueTask WriteInternalAsync(
         ReadOnlyMemory<byte>? buffer,
         ZSTD_EndDirective directive,
@@ -218,7 +218,7 @@ await innerStream
         );
     }
 
-#if !NETSTANDARD2_0 && !NETFRAMEWORK
+#if !LEGACY_DOTNET
 
     public override Task WriteAsync(
         byte[] buffer,
diff --git a/src/SharpCompress/Compressors/ZStandard/DecompressionStream.cs b/src/SharpCompress/Compressors/ZStandard/DecompressionStream.cs
index 78af43513..c1aed7662 100644
--- a/src/SharpCompress/Compressors/ZStandard/DecompressionStream.cs
+++ b/src/SharpCompress/Compressors/ZStandard/DecompressionStream.cs
@@ -105,7 +105,7 @@ protected override void Dispose(bool disposing)
     public override int Read(byte[] buffer, int offset, int count) =>
         Read(new Span<byte>(buffer, offset, count));
 
-#if !NETSTANDARD2_0 && !NETFRAMEWORK
+#if !LEGACY_DOTNET
     public override int Read(Span<byte> buffer)
 #else
     public int Read(Span<byte> buffer)
@@ -158,7 +158,7 @@ public int Read(Span<byte> buffer)
         }
     }
 
-#if !NETSTANDARD2_0 && !NETFRAMEWORK
+#if !LEGACY_DOTNET
     public override Task<int> ReadAsync(
         byte[] buffer,
         int offset,
@@ -276,7 +276,7 @@ private void EnsureNotDisposed()
             throw new ObjectDisposedException(nameof(DecompressionStream));
     }
 
-#if NETSTANDARD2_0 || NETFRAMEWORK
+#if LEGACY_DOTNET
     public virtual Task DisposeAsync()
     {
         try
diff --git a/src/SharpCompress/Compressors/ZStandard/UnsafeHelper.cs b/src/SharpCompress/Compressors/ZStandard/UnsafeHelper.cs
index b145099b3..a73023c4f 100644
--- a/src/SharpCompress/Compressors/ZStandard/UnsafeHelper.cs
+++ b/src/SharpCompress/Compressors/ZStandard/UnsafeHelper.cs
@@ -16,7 +16,7 @@ public static unsafe class UnsafeHelper
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     public static void* malloc(ulong size)
     {
-#if NET6_0_OR_GREATER
+#if NET8_0_OR_GREATER
         var ptr = NativeMemory.Alloc((nuint)size);
 #else
         var ptr = (void*)Marshal.AllocHGlobal((nint)size);
@@ -31,7 +31,7 @@ public static unsafe class UnsafeHelper
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     public static void* calloc(ulong num, ulong size)
     {
-#if NET6_0_OR_GREATER
+#if NET8_0_OR_GREATER
         return NativeMemory.AllocZeroed((nuint)num, (nuint)size);
 #else
         var total = num * size;
@@ -53,7 +53,7 @@ public static void memset(void* memPtr, byte val, uint size) =>
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     public static void free(void* ptr)
     {
-#if NET6_0_OR_GREATER
+#if NET8_0_OR_GREATER
         NativeMemory.Free(ptr);
 #else
         Marshal.FreeHGlobal((IntPtr)ptr);
diff --git a/src/SharpCompress/Crypto/Crc32Stream.cs b/src/SharpCompress/Crypto/Crc32Stream.cs
index dfbcfac8b..0dbcce8c5 100644
--- a/src/SharpCompress/Crypto/Crc32Stream.cs
+++ b/src/SharpCompress/Crypto/Crc32Stream.cs
@@ -70,7 +70,7 @@ public override int Read(byte[] buffer, int offset, int count) =>
 
     public override void SetLength(long value) => throw new NotSupportedException();
 
-#if !NETFRAMEWORK && !NETSTANDARD2_0
+#if !LEGACY_DOTNET
 
     public override void Write(ReadOnlySpan<byte> buffer)
     {
diff --git a/src/SharpCompress/IO/BufferedSubStream.cs b/src/SharpCompress/IO/BufferedSubStream.cs
index 747c97763..7a51bb0ff 100755
--- a/src/SharpCompress/IO/BufferedSubStream.cs
+++ b/src/SharpCompress/IO/BufferedSubStream.cs
@@ -154,7 +154,7 @@ CancellationToken cancellationToken
         return count;
     }
 
-#if !NETFRAMEWORK && !NETSTANDARD2_0
+#if !LEGACY_DOTNET
     public override async ValueTask<int> ReadAsync(
         Memory<byte> buffer,
         CancellationToken cancellationToken = default
diff --git a/src/SharpCompress/IO/ProgressReportingStream.cs b/src/SharpCompress/IO/ProgressReportingStream.cs
index 5ed028351..efadba41d 100644
--- a/src/SharpCompress/IO/ProgressReportingStream.cs
+++ b/src/SharpCompress/IO/ProgressReportingStream.cs
@@ -64,7 +64,7 @@ public override int Read(byte[] buffer, int offset, int count)
         return bytesRead;
     }
 
-#if !NETFRAMEWORK && !NETSTANDARD2_0
+#if !LEGACY_DOTNET
     public override int Read(Span<byte> buffer)
     {
         var bytesRead = _baseStream.Read(buffer);
@@ -95,7 +95,7 @@ CancellationToken cancellationToken
         return bytesRead;
     }
 
-#if !NETFRAMEWORK && !NETSTANDARD2_0
+#if !LEGACY_DOTNET
     public override async ValueTask<int> ReadAsync(
         Memory<byte> buffer,
         CancellationToken cancellationToken = default
@@ -147,7 +147,7 @@ protected override void Dispose(bool disposing)
         base.Dispose(disposing);
     }
 
-#if !NETFRAMEWORK && !NETSTANDARD2_0
+#if !LEGACY_DOTNET
     public override async ValueTask DisposeAsync()
     {
         if (!_leaveOpen)
diff --git a/src/SharpCompress/IO/ReadOnlySubStream.cs b/src/SharpCompress/IO/ReadOnlySubStream.cs
index 86ef16459..c9d7d830a 100644
--- a/src/SharpCompress/IO/ReadOnlySubStream.cs
+++ b/src/SharpCompress/IO/ReadOnlySubStream.cs
@@ -81,7 +81,7 @@ public override int ReadByte()
         return value;
     }
 
-#if !NETFRAMEWORK && !NETSTANDARD2_0
+#if !LEGACY_DOTNET
     public override int Read(Span<byte> buffer)
     {
         var sliceLen = BytesLeftToRead < buffer.Length ? BytesLeftToRead : buffer.Length;
@@ -117,7 +117,7 @@ CancellationToken cancellationToken
         return read;
     }
 
-#if !NETFRAMEWORK && !NETSTANDARD2_0
+#if !LEGACY_DOTNET
     public override async ValueTask<int> ReadAsync(
         Memory<byte> buffer,
         CancellationToken cancellationToken = default
diff --git a/src/SharpCompress/IO/SharpCompressStream.cs b/src/SharpCompress/IO/SharpCompressStream.cs
index 948fdb57f..ad4c6e351 100644
--- a/src/SharpCompress/IO/SharpCompressStream.cs
+++ b/src/SharpCompress/IO/SharpCompressStream.cs
@@ -384,7 +384,7 @@ public override async Task FlushAsync(CancellationToken cancellationToken)
         await Stream.FlushAsync(cancellationToken).ConfigureAwait(false);
     }
 
-#if !NETFRAMEWORK && !NETSTANDARD2_0
+#if !LEGACY_DOTNET
 
     public override async ValueTask<int> ReadAsync(
         Memory<byte> buffer,
diff --git a/src/SharpCompress/IO/SourceStream.cs b/src/SharpCompress/IO/SourceStream.cs
index 0712d915c..e9cc74a63 100644
--- a/src/SharpCompress/IO/SourceStream.cs
+++ b/src/SharpCompress/IO/SourceStream.cs
@@ -289,7 +289,7 @@ CancellationToken cancellationToken
         return total - count;
     }
 
-#if !NETFRAMEWORK && !NETSTANDARD2_0
+#if !LEGACY_DOTNET
 
     public override async ValueTask<int> ReadAsync(
         Memory<byte> buffer,
diff --git a/src/SharpCompress/NotNullExtensions.cs b/src/SharpCompress/NotNullExtensions.cs
index 4fdd355ce..0f5ba99cd 100644
--- a/src/SharpCompress/NotNullExtensions.cs
+++ b/src/SharpCompress/NotNullExtensions.cs
@@ -21,7 +21,7 @@ public static IEnumerable<T> Empty<T>(this T? source)
         return source.AsEnumerable();
     }
 
-#if NETFRAMEWORK || NETSTANDARD
+#if LEGACY_DOTNET
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     public static T NotNull<T>(this T? obj, string? message = null)
         where T : class
diff --git a/src/SharpCompress/Polyfills/StringExtensions.cs b/src/SharpCompress/Polyfills/StringExtensions.cs
index 57d1e1bc9..c83dee70e 100644
--- a/src/SharpCompress/Polyfills/StringExtensions.cs
+++ b/src/SharpCompress/Polyfills/StringExtensions.cs
@@ -1,4 +1,4 @@
-#if NETFRAMEWORK || NETSTANDARD2_0
+#if LEGACY_DOTNET
 
 namespace SharpCompress;
 
diff --git a/src/SharpCompress/Readers/AbstractReader.cs b/src/SharpCompress/Readers/AbstractReader.cs
index 29e700aaa..123576c29 100644
--- a/src/SharpCompress/Readers/AbstractReader.cs
+++ b/src/SharpCompress/Readers/AbstractReader.cs
@@ -277,7 +277,7 @@ private async ValueTask SkipAsync(CancellationToken cancellationToken)
             }
         }
         //don't know the size so we have to try to decompress to skip
-#if NETFRAMEWORK || NETSTANDARD2_0
+#if LEGACY_DOTNET
         using var s = await OpenEntryStreamAsync(cancellationToken).ConfigureAwait(false);
         await s.SkipEntryAsync(cancellationToken).ConfigureAwait(false);
 #else
@@ -344,7 +344,7 @@ internal void Write(Stream writeStream)
 
     internal async ValueTask WriteAsync(Stream writeStream, CancellationToken cancellationToken)
     {
-#if NETFRAMEWORK || NETSTANDARD2_0
+#if LEGACY_DOTNET
         using Stream s = await OpenEntryStreamAsync(cancellationToken).ConfigureAwait(false);
         var sourceStream = WrapWithProgress(s, Entry);
         await sourceStream.CopyToAsync(writeStream, 81920, cancellationToken).ConfigureAwait(false);
diff --git a/src/SharpCompress/SharpCompress.csproj b/src/SharpCompress/SharpCompress.csproj
index a48b0b7a7..2e9f4056c 100644
--- a/src/SharpCompress/SharpCompress.csproj
+++ b/src/SharpCompress/SharpCompress.csproj
@@ -28,6 +28,9 @@
     <EmbedUntrackedSources>true</EmbedUntrackedSources>
     <AllowedOutputExtensionsInPackageBuildOutputFolder>$(AllowedOutputExtensionsInPackageBuildOutputFolder);.pdb</AllowedOutputExtensionsInPackageBuildOutputFolder>
   </PropertyGroup>
+  <PropertyGroup Condition=" '$(TargetFramework)' == 'net48' Or '$(TargetFramework)' == 'netstandard20' ">
+    <DefineConstants>$(DefineConstants);LEGACY_DOTNET</DefineConstants>
+  </PropertyGroup>
   <PropertyGroup Condition=" '$(TargetFramework)' == 'net8.0' Or '$(TargetFramework)' == 'net10.0' ">
     <IsTrimmable>true</IsTrimmable>
   </PropertyGroup>
diff --git a/src/SharpCompress/Utility.cs b/src/SharpCompress/Utility.cs
index 5fd18e6bb..5b3ed2ddc 100644
--- a/src/SharpCompress/Utility.cs
+++ b/src/SharpCompress/Utility.cs
@@ -189,7 +189,7 @@ public async ValueTask SkipAsync(
             }
         }
 
-#if NET60_OR_GREATER
+#if NET8_0_OR_GREATER
         public bool ReadFully(byte[] buffer)
         {
             try
diff --git a/src/SharpCompress/packages.lock.json b/src/SharpCompress/packages.lock.json
index 413253332..032c15c49 100644
--- a/src/SharpCompress/packages.lock.json
+++ b/src/SharpCompress/packages.lock.json
@@ -216,9 +216,9 @@
     "net10.0": {
       "Microsoft.NET.ILLink.Tasks": {
         "type": "Direct",
-        "requested": "[10.0.0, )",
-        "resolved": "10.0.0",
-        "contentHash": "kICGrGYEzCNI3wPzfEXcwNHgTvlvVn9yJDhSdRK+oZQy4jvYH529u7O0xf5ocQKzOMjfS07+3z9PKRIjrFMJDA=="
+        "requested": "[10.0.1, )",
+        "resolved": "10.0.1",
+        "contentHash": "ISahzLHsHY7vrwqr2p1YWZ+gsxoBRtH7gWRDK8fDUst9pp2He0GiesaqEfeX0V8QMCJM3eNEHGGpnIcPjFo2NQ=="
       },
       "Microsoft.NETFramework.ReferenceAssemblies": {
         "type": "Direct",