diff --git a/src/SharpCompress/Compressors/PPMd/H/ModelPPM.cs b/src/SharpCompress/Compressors/PPMd/H/ModelPPM.cs
index 1718cbb4..6405423a 100644
--- a/src/SharpCompress/Compressors/PPMd/H/ModelPPM.cs
+++ b/src/SharpCompress/Compressors/PPMd/H/ModelPPM.cs
@@ -281,13 +281,13 @@ internal class ModelPpm
 
     internal bool DecodeInit(IRarUnpack unpackRead, int escChar)
     {
-        var maxOrder = unpackRead.Char & 0xff;
+        var maxOrder = unpackRead.ReadChar() & 0xff;
         var reset = ((maxOrder & 0x20) != 0);
 
         var maxMb = 0;
         if (reset)
         {
-            maxMb = unpackRead.Char;
+            maxMb = unpackRead.ReadChar();
         }
         else
         {
@@ -298,7 +298,7 @@ internal class ModelPpm
         }
         if ((maxOrder & 0x40) != 0)
         {
-            escChar = unpackRead.Char;
+            escChar = unpackRead.ReadChar();
             unpackRead.PpmEscChar = escChar;
         }
         Coder = new RangeCoder(unpackRead);
diff --git a/src/SharpCompress/Compressors/PPMd/H/RangeCoder.cs b/src/SharpCompress/Compressors/PPMd/H/RangeCoder.cs
index 59bdd926..7cda0fec 100644
--- a/src/SharpCompress/Compressors/PPMd/H/RangeCoder.cs
+++ b/src/SharpCompress/Compressors/PPMd/H/RangeCoder.cs
@@ -62,7 +62,7 @@ internal class RangeCoder
         _range = 0xFFFFffffL;
         for (var i = 0; i < 4; i++)
         {
-            _code = ((_code << 8) | Char) & UINT_MASK;
+            _code = ((_code << 8) | ReadChar()) & UINT_MASK;
         }
     }
 
@@ -91,20 +91,17 @@ internal class RangeCoder
         }
     }
 
-    private long Char
+    private long ReadChar()
     {
-        get
+        if (_unpackRead != null)
         {
-            if (_unpackRead != null)
-            {
-                return (_unpackRead.Char);
-            }
-            if (_stream != null)
-            {
-                return _stream.ReadByte();
-            }
-            return -1;
+            return (_unpackRead.ReadChar());
         }
+        if (_stream != null)
+        {
+            return _stream.ReadByte();
+        }
+        return -1;
     }
 
     internal SubRange SubRange { get; private set; }
@@ -139,7 +136,7 @@ internal class RangeCoder
                 _range = (-_low & (BOT - 1)) & UINT_MASK;
                 c2 = false;
             }
-            _code = ((_code << 8) | Char) & UINT_MASK;
+            _code = ((_code << 8) | ReadChar()) & UINT_MASK;
             _range = (_range << 8) & UINT_MASK;
             _low = (_low << 8) & UINT_MASK;
         }
diff --git a/src/SharpCompress/Compressors/Rar/IRarUnpack.cs b/src/SharpCompress/Compressors/Rar/IRarUnpack.cs
index 7626f4ac..45729bf5 100644
--- a/src/SharpCompress/Compressors/Rar/IRarUnpack.cs
+++ b/src/SharpCompress/Compressors/Rar/IRarUnpack.cs
@@ -22,6 +22,7 @@ internal interface IRarUnpack
     bool Suspended { get; set; }
 
     long DestSize { get; }
-    int Char { get; }
+    int ReadChar();
+    ValueTask<int> ReadCharAsync(CancellationToken cancellationToken);
     int PpmEscChar { get; set; }
 }
diff --git a/src/SharpCompress/Compressors/Rar/UnpackV1/Unpack.cs b/src/SharpCompress/Compressors/Rar/UnpackV1/Unpack.cs
index 929c4eb7..65697a6a 100644
--- a/src/SharpCompress/Compressors/Rar/UnpackV1/Unpack.cs
+++ b/src/SharpCompress/Compressors/Rar/UnpackV1/Unpack.cs
@@ -55,16 +55,13 @@ internal sealed partial class Unpack : BitInput, IRarUnpack
         set => suspended = value;
     }
 
-    public int Char
+    public int ReadChar()
     {
-        get
+        if (inAddr > MAX_SIZE - 30)
         {
-            if (inAddr > MAX_SIZE - 30)
-            {
-                unpReadBuf();
-            }
-            return (InBuf[inAddr++] & 0xff);
+            unpReadBuf();
         }
+        return (InBuf[inAddr++] & 0xff);
     }
 
     public int PpmEscChar { get; set; }
diff --git a/src/SharpCompress/Compressors/Rar/UnpackV2017/Unpack.cs b/src/SharpCompress/Compressors/Rar/UnpackV2017/Unpack.cs
index 7784d98a..27cf0a67 100644
--- a/src/SharpCompress/Compressors/Rar/UnpackV2017/Unpack.cs
+++ b/src/SharpCompress/Compressors/Rar/UnpackV2017/Unpack.cs
@@ -154,17 +154,25 @@ internal partial class Unpack : IRarUnpack
 
     public long DestSize => DestUnpSize;
 
-    public int Char
+    public int ReadChar()
     {
-        get
+        // TODO: coderb: not sure where the "MAXSIZE-30" comes from, ported from V1 code
+        if (InAddr > MAX_SIZE - 30)
         {
-            // TODO: coderb: not sure where the "MAXSIZE-30" comes from, ported from V1 code
-            if (InAddr > MAX_SIZE - 30)
-            {
-                UnpReadBuf();
-            }
-            return InBuf[InAddr++];
+            UnpReadBuf();
         }
+        return InBuf[InAddr++];
+    }
+
+    public async ValueTask<int> ReadCharAsync(CancellationToken cancellationToken = default)
+    {
+        cancellationToken.ThrowIfCancellationRequested();
+        // TODO: coderb: not sure where the "MAXSIZE-30" comes from, ported from V1 code
+        if (InAddr > MAX_SIZE - 30)
+        {
+            await UnpReadBufAsync(cancellationToken).ConfigureAwait(false);
+        }
+        return InBuf[InAddr++];
     }
 
     public int PpmEscChar