Comments fix.

Author: Adit Sheth

src/Http/Http.Extensions/src/DefaultProblemDetailsWriter.cs

@@ -56,16 +56,17 @@ public ValueTask WriteAsync(ProblemDetailsContext context)
         ProblemDetailsDefaults.Apply(context.ProblemDetails, httpContext.Response.StatusCode);
 
         var traceId = Activity.Current?.Id ?? httpContext.TraceIdentifier;
-        var tradeIdKeyName = _serializerOptions.PropertyNamingPolicy.ConvertName("traceId");
+
+        var traceIdKeyName = _serializerOptions.PropertyNamingPolicy?.ConvertName("traceId") ?? "traceId";
         context.ProblemDetails.Extensions[traceIdKeyName] = traceId;
 
         _options.CustomizeProblemDetails?.Invoke(context);
 
         var problemDetailsType = context.ProblemDetails.GetType();
 
         return new ValueTask(httpContext.Response.WriteAsJsonAsync(
-                        context.ProblemDetails,
-                         _serializerOptions.GetTypeInfo(problemDetailsType),
-                        contentType: "application/problem+json"));
+            context.ProblemDetails,
+            _serializerOptions.GetTypeInfo(problemDetailsType),
+            contentType: "application/problem+json"));
     }
 }