private async Task <Guid?> SaveExamLogs(ExamForRenderDTO examRaw, Guid destId, Guid?instructor) { var examLog = new ExamLogDTO { RenderExamType = examRaw.RenderExamType, Name = examRaw.Name, RawExamRendered = JsonConvert.SerializeObject(examRaw), ExamCatInstructorId = instructor, DestinationId = destId, ExamCategoryId = examRaw.Id }; var res = await _ExamLogService.CreateAsync(examLog); if (res.Success) { return(res.Data.Id); } else { return(null); } }