From 5c1547c2846d735bcd3cb8fe66925f370cc1df94 Mon Sep 17 00:00:00 2001
From: Adam Hathcock <adam@hathcock.uk>
Date: Mon, 16 Feb 2026 11:03:59 +0000
Subject: [PATCH] build fixes

---
 .../Common/Rar/AsyncMarkingBinaryReader.cs            |  1 +
 .../Compressors/LZMA/LzmaDecoder.Async.cs             | 11 ++++++++++-
 src/SharpCompress/Compressors/LZMA/LzmaDecoder.cs     |  8 +++++++-
 src/SharpCompress/Polyfills/StringExtensions.cs       |  9 ++++++++-
 4 files changed, 26 insertions(+), 3 deletions(-)

diff --git a/src/SharpCompress/Common/Rar/AsyncMarkingBinaryReader.cs b/src/SharpCompress/Common/Rar/AsyncMarkingBinaryReader.cs
index 5636f321..27d0e324 100644
--- a/src/SharpCompress/Common/Rar/AsyncMarkingBinaryReader.cs
+++ b/src/SharpCompress/Common/Rar/AsyncMarkingBinaryReader.cs
@@ -192,6 +192,7 @@ internal class AsyncMarkingBinaryReader : IDisposable
     }
 
     public virtual void Dispose() => _reader.Dispose();
+
 #if NET8_0_OR_GREATER
     public virtual ValueTask DisposeAsync() => _reader.DisposeAsync();
 #endif
diff --git a/src/SharpCompress/Compressors/LZMA/LzmaDecoder.Async.cs b/src/SharpCompress/Compressors/LZMA/LzmaDecoder.Async.cs
index b1d061e8..d8f7c51b 100644
--- a/src/SharpCompress/Compressors/LZMA/LzmaDecoder.Async.cs
+++ b/src/SharpCompress/Compressors/LZMA/LzmaDecoder.Async.cs
@@ -9,8 +9,17 @@ using SharpCompress.Compressors.LZMA.RangeCoder;
 
 namespace SharpCompress.Compressors.LZMA;
 
-public partial class Decoder : ICoder, ISetDecoderProperties
+public partial class Decoder : IAsyncDisposable
 {
+    public async ValueTask DisposeAsync()
+    {
+        if (_outWindow is not null)
+        {
+            await _outWindow.DisposeAsync().ConfigureAwait(false);
+            _outWindow = null;
+        }
+    }
+
     partial class LenDecoder
     {
         public async ValueTask<uint> DecodeAsync(
diff --git a/src/SharpCompress/Compressors/LZMA/LzmaDecoder.cs b/src/SharpCompress/Compressors/LZMA/LzmaDecoder.cs
index d12adbff..49a0e4c2 100644
--- a/src/SharpCompress/Compressors/LZMA/LzmaDecoder.cs
+++ b/src/SharpCompress/Compressors/LZMA/LzmaDecoder.cs
@@ -9,8 +9,14 @@ using SharpCompress.Compressors.LZMA.RangeCoder;
 
 namespace SharpCompress.Compressors.LZMA;
 
-public partial class Decoder : ICoder, ISetDecoderProperties // ,System.IO.Stream
+public partial class Decoder : ICoder, ISetDecoderProperties, IDisposable
 {
+    public void Dispose()
+    {
+        _outWindow?.Dispose();
+        _outWindow = null;
+    }
+
     private partial class LenDecoder
     {
         private BitDecoder _choice = new();
diff --git a/src/SharpCompress/Polyfills/StringExtensions.cs b/src/SharpCompress/Polyfills/StringExtensions.cs
index c83dee70..84e1cbbe 100644
--- a/src/SharpCompress/Polyfills/StringExtensions.cs
+++ b/src/SharpCompress/Polyfills/StringExtensions.cs
@@ -1,4 +1,6 @@
-#if LEGACY_DOTNET
+using System;
+
+#if LEGACY_DOTNET
 
 namespace SharpCompress;
 
@@ -10,4 +12,9 @@ internal static class StringExtensions
     internal static bool Contains(this string text, char value) => text.IndexOf(value) > -1;
 }
 
+[AttributeUsage(
+    AttributeTargets.Parameter | AttributeTargets.Property | AttributeTargets.ReturnValue
+)]
+public class NotNullAttribute : Attribute;
+
 #endif