diff --git a/src/SharpCompress/Factories/ArcFactory.cs b/src/SharpCompress/Factories/ArcFactory.cs
index c9611d7c..469ee136 100644
--- a/src/SharpCompress/Factories/ArcFactory.cs
+++ b/src/SharpCompress/Factories/ArcFactory.cs
@@ -26,11 +26,11 @@ namespace SharpCompress.Factories
         public override bool IsArchive(Stream stream, string? password = null)
         {
             //You may have to use some(paranoid) checks to ensure that you actually are
-            //processing an ARC file, since other archivers also adopted to the idea of putting
-            //a 01Ah byte at offset 0, namely: Hyper archiver. To check if you have a
+            //processing an ARC file, since other archivers also adopted the idea of putting
+            //a 01Ah byte at offset 0, namely the Hyper archiver. To check if you have a
             //Hyper - archive, check the next two bytes for "HP" or "ST"(or look below for
-            //"HYP").Also, ZOO archiver also does put a 01Ah at the start of the file,
-            //see: ZOO entry below.
+            //"HYP").Also the ZOO archiver also does put a 01Ah at the start of the file,
+            //see the ZOO entry below.
             var bytes = new byte[2];
             stream.Read(bytes, 0, 2);
             return bytes[0] == 0x1A && bytes[1] < 10; //rather thin, but this is all we have
diff --git a/src/SharpCompress/Readers/ReaderOptions.cs b/src/SharpCompress/Readers/ReaderOptions.cs
index 49a91e93..b016a3b6 100644
--- a/src/SharpCompress/Readers/ReaderOptions.cs
+++ b/src/SharpCompress/Readers/ReaderOptions.cs
@@ -5,6 +5,16 @@ namespace SharpCompress.Readers;
 
 public class ReaderOptions : OptionsBase
 {
+    /// <summary>
+    /// The default buffer size for stream operations.
+    /// This value (65536 bytes) is preserved for backward compatibility.
+    /// New code should use Constants.BufferSize instead (81920 bytes), which matches .NET's Stream.CopyTo default.
+    /// </summary>
+    [Obsolete(
+        "Use Constants.BufferSize instead. This constant will be removed in a future version."
+    )]
+    public const int DefaultBufferSize = 0x10000;
+
     /// <summary>
     /// Look for RarArchive (Check for self-extracting archives or cases where RarArchive isn't at the start of the file)
     /// </summary>