diff --git a/Refit/SystemTextJsonContentSerializer.cs b/Refit/SystemTextJsonContentSerializer.cs
index d4c56301f..fe0f66a8a 100644
--- a/Refit/SystemTextJsonContentSerializer.cs
+++ b/Refit/SystemTextJsonContentSerializer.cs
@@ -80,51 +80,24 @@ public class ObjectToInferredTypesConverter
        : JsonConverter<object>
     {
         public override object? Read(
-            ref Utf8JsonReader reader,
-            Type typeToConvert,
-            JsonSerializerOptions options)
-        {
-            if (reader.TokenType == JsonTokenType.True)
-            {
-                return true;
-            }
-
-            if (reader.TokenType == JsonTokenType.False)
-            {
-                return false;
-            }
-
-            if (reader.TokenType == JsonTokenType.Number)
-            {
-                if (reader.TryGetInt64(out var l))
-                {
-                    return l;
-                }
-
-                return reader.GetDouble();
-            }
-
-            if (reader.TokenType == JsonTokenType.String)
-            {
-                if (reader.TryGetDateTime(out var datetime))
-                {
-                    return datetime;
-                }
-
-                return reader.GetString();
-            }
-
-            // Use JsonElement as fallback.
-            // Newtonsoft uses JArray or JObject.
-            using var document = JsonDocument.ParseValue(ref reader);
-            return document.RootElement.Clone();
-        }
+          ref Utf8JsonReader reader,
+          Type typeToConvert,
+          JsonSerializerOptions options) => reader.TokenType switch
+          {
+              JsonTokenType.True => true,
+              JsonTokenType.False => false,
+              JsonTokenType.Number when reader.TryGetInt64(out var l) => l,
+              JsonTokenType.Number => reader.GetDouble(),
+              JsonTokenType.String when reader.TryGetDateTime(out var datetime) => datetime,
+              JsonTokenType.String => reader.GetString(),
+              _ => JsonDocument.ParseValue(ref reader).RootElement.Clone()
+          };
 
         public override void Write(
             Utf8JsonWriter writer,
             object objectToWrite,
             JsonSerializerOptions options) =>
-                throw new InvalidOperationException("Should not get here.");
+            JsonSerializer.Serialize(writer, objectToWrite, objectToWrite.GetType(), options);
     }
 
 }