From 3fb8387419fa1ca1907179e5ddfee39a3d03e7ec Mon Sep 17 00:00:00 2001
From: Adam Hathcock <adam@hathcock.uk>
Date: Thu, 5 Feb 2026 09:34:54 +0000
Subject: [PATCH] leave stream open

---
 src/SharpCompress/IO/SeekableSharpCompressStream.cs |  4 +++-
 src/SharpCompress/IO/SharpCompressStream.Create.cs  | 12 ++++++++++--
 2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/src/SharpCompress/IO/SeekableSharpCompressStream.cs b/src/SharpCompress/IO/SeekableSharpCompressStream.cs
index 2f94b641..28b67c4e 100644
--- a/src/SharpCompress/IO/SeekableSharpCompressStream.cs
+++ b/src/SharpCompress/IO/SeekableSharpCompressStream.cs
@@ -22,7 +22,7 @@ internal sealed partial class SeekableSharpCompressStream : SharpCompressStream
     /// </summary>
     public override bool ThrowOnDispose { get; set; }
 
-    public SeekableSharpCompressStream(Stream stream)
+    public SeekableSharpCompressStream(Stream stream, bool leaveStreamOpen = false)
         : base(Null, true, false, null)
     {
         if (stream is null)
@@ -33,6 +33,8 @@ internal sealed partial class SeekableSharpCompressStream : SharpCompressStream
         {
             throw new ArgumentException("Stream must be seekable", nameof(stream));
         }
+
+        LeaveStreamOpen = leaveStreamOpen;
         _stream = stream;
     }
 
diff --git a/src/SharpCompress/IO/SharpCompressStream.Create.cs b/src/SharpCompress/IO/SharpCompressStream.Create.cs
index 40db0bee..ae71003b 100644
--- a/src/SharpCompress/IO/SharpCompressStream.Create.cs
+++ b/src/SharpCompress/IO/SharpCompressStream.Create.cs
@@ -28,10 +28,18 @@ internal partial class SharpCompressStream
                 if (underlying.CanSeek)
                 {
                     // Create SeekableSharpCompressStream that preserves LeaveStreamOpen
-                    return new SeekableSharpCompressStream(underlying);
+                    return new SeekableSharpCompressStream(
+                        underlying,
+                        sharpCompressStream.LeaveStreamOpen
+                    );
                 }
                 // Non-seekable underlying stream - wrap with rolling buffer
-                return new SharpCompressStream(underlying, true, false, rewindableBufferSize);
+                return new SharpCompressStream(
+                    underlying,
+                    sharpCompressStream.LeaveStreamOpen,
+                    false,
+                    rewindableBufferSize
+                );
             }
             // Not passthrough - return as-is
             return sharpCompressStream;