.NET 6 API部署Azure后JSON输出异常问题求助

我使用.NET 6结合Entity Framework开发API，对接Soup API后封装新接口。本地测试时，接口可正常输出预期的JSON结果，但将项目部署到Azure后，API输出不符合预期。

[HttpGet("[action]")]
public IActionResult GetExamService(string id, string Examcodes, string codes)
{
    try
    {
        ExamServiceClient exam = new();
        ExamDetailsStructure abilitiesExam = new();
        ExamResults.PersonNameBody ApplicantName = new();
        var response = exam.GetExamResultAsync(id, Examcodes, codes).Result.Item;
        if (!response.GetType().ToString().Equals(abilitiesExam.GetType().ToString()))
        {
            throw new NullReferenceException("no data found " + id);
        }
        abilitiesExam = (ExamDetailsStructure)response;
        ApplicantName = (QyiasExamResults.PersonNameBody)abilitiesExam.ApplicantName.Item;

        ExamDetailsBody ExamDetailsBody = new()
        {
            ExamSpecialty = abilitiesExam.ExamSpecialty.ToString() ?? "",
            ExamResultTypeEnSpecified = abilitiesExam.ExamResult.ExamResultTypeEnSpecified.ToString() ?? "",
        };
        return Ok(new
        {
            ExamDetailsBody = ExamDetailsBody
        });
    }
    catch (NullReferenceException ex)
    {
        ErrorResponse error = new(ex.Message, StatusCodes.Status404NotFound);
        return StatusCode((int)HttpStatusCode.NotFound, error);
    }
    catch
    {
        ErrorResponse error = new("internal server error", StatusCodes.Status500InternalServerError);
        return StatusCode((int)HttpStatusCode.InternalServerError, error);
    }
}

本地测试JSON输出 #

Azure部署后输出结果 #

内容的提问来源于stack exchange，提问作者sp 4_4