From 2d43305da53ec3ed1f272bbd868ff246cd693b64 Mon Sep 17 00:00:00 2001
From: Oleksandr Poliakov <oleksandr.poliakov@mongodb.com>
Date: Fri, 17 Oct 2025 10:52:43 -0700
Subject: [PATCH] CSHARP-3984: Remove BinaryConnection.DropBox - fix big-endian
 support

---
 src/MongoDB.Driver/Core/Connections/BinaryConnection.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/MongoDB.Driver/Core/Connections/BinaryConnection.cs b/src/MongoDB.Driver/Core/Connections/BinaryConnection.cs
index a775f7dff0d..3359a33821e 100644
--- a/src/MongoDB.Driver/Core/Connections/BinaryConnection.cs
+++ b/src/MongoDB.Driver/Core/Connections/BinaryConnection.cs
@@ -463,7 +463,7 @@ public async Task<ResponseMessage> ReceiveMessageAsync(
         private int GetResponseTo(IByteBuffer message)
         {
             var backingBytes = message.AccessBackingBytes(8);
-            return BitConverter.ToInt32(backingBytes.Array, backingBytes.Offset);
+            return BinaryPrimitives.ReadInt32LittleEndian(backingBytes.Array.AsSpan().Slice(backingBytes.Offset, 4));
         }
 
         private void SendBuffer(OperationContext operationContext, IByteBuffer buffer)