.Net處理string類型的JSON字符串

using Newtonsoft.Json.Converters;

public class QualityInfoJson
    {
        public string QualityInspectorsID { get; set; }
        public string BIMID { get; set; }
        public string QuestionType { get; set; }
        public string QuestionDescription { get; set; }
        public string EndDate { get; set; }
        public string ResposibilitiesID { get; set; }

        public string ProjectId { get; set; }
        public string SectionId { get; set; }

    }

  public bool QualityInfoAdd(string QualityInfoJsn, string FileType, byte[] File, string FileName)
        {
            try
            {
                string jso = "{\"QualityInspectorsID\":\"44\",\"BIMID\":\"1010301010011\",\"QuestionType\":\"1\",\"QuestionDescription\":\"test\",\"EndDate\":\"2017-9-2\",\"ResposibilitiesID\":\"78,34,56,87\",\"ProjectId\":\"44\",\"SectionId\":\"25\"}";
                QualityInfoJson QualityInfo = DeserializeJsonToObject<QualityInfoJson>(jso);
                res = DBHelper.Db.ExecuteNonQuery(@"  Insert into t_AddressBookAddFavorite(QualityInspectorsID,BIMID,QuestionType,QuestionDescription,EndDate,ResposibilitiesID,AttachmentType,AttachmentFiles,IsNotified,CreateTime,ProjectId,SectionId)                                    values(@QualityInspectorsID,@BIMID,@QuestionType,@QuestionDescription,@EndDate,@ResposibilitiesID,@AttachmentType,@AttachmentFiles,@IsNotified,@CreateTime,@ProjectId,@SectionId)",
                                     new DbParameter[] { DBHelper.Db.ParIn("@QualityInspectorsID", QualityInfo.QualityInspectorsID),
                                                     DBHelper.Db.ParIn("@BIMID",QualityInfo.BIMID),
                                                     DBHelper.Db.ParIn("@QuestionType",QualityInfo.QuestionType),
                                                     DBHelper.Db.ParIn("@QuestionDescription",QualityInfo.QuestionDescription),
                                                     DBHelper.Db.ParIn("@EndDate",QualityInfo.EndDate),
                                                     DBHelper.Db.ParIn("@ResposibilitiesID",QualityInfo.ResposibilitiesID),
                                                     DBHelper.Db.ParIn("@AttachmentType",FileType),
                                                     DBHelper.Db.ParIn("@AttachmentFiles",FileName),
                                                     DBHelper.Db.ParIn("@IsNotified",0),
                                                     DBHelper.Db.ParIn("@CreateTime",DateTime.Now),
                                                     DBHelper.Db.ParIn("@ProjectId",QualityInfo.ProjectId),
                                                     DBHelper.Db.ParIn("@SectionId",QualityInfo.SectionId),
                                                     });
                if (res > 0)
                {
                    return true;
                }
                else
                    return false;
            }
            catch (Exception)
            {
                res = 0;
                return false;
            }
        }