diff --git a/src/assets/Generator.Shared/FormUrlEncodedContent.cs b/src/assets/Generator.Shared/FormUrlEncodedContent.cs
index a8b8cbfc4ad..c60e2f5a898 100644
--- a/src/assets/Generator.Shared/FormUrlEncodedContent.cs
+++ b/src/assets/Generator.Shared/FormUrlEncodedContent.cs
@@ -34,7 +34,11 @@ private void BuildIfNeeded ()
         public override async Task WriteToAsync(Stream stream, CancellationToken cancellation)
         {
             BuildIfNeeded ();
+#if NET6_0_OR_NEWER
+            await stream.WriteAsync(_bytes.AsSpan(0, _bytes.Length), cancellation).ConfigureAwait(false);
+#else
             await stream.WriteAsync(_bytes, 0, _bytes.Length, cancellation).ConfigureAwait(false);
+#endif
         }
 
         public override void WriteTo(Stream stream, CancellationToken cancellation)