public void SendAnswer(SentPersonalData_Answers Pdata_Answer, int id)
        {
            var existingAnswer = _answers.FindOne(ans => id == ans.SurveyId);

            if (existingAnswer == null)
            {
                //Survey not exists
                return;
            }
            else
            {
                //Survey Exists
                var oldPage = _answers.FindOne(ans => ans.SurveyId == id).Answers.Find(ans => ans.PersonalData.Email == Pdata_Answer.PersonalData.Email).Pages.Find(page => page.PageNumber == Pdata_Answer.Pages[0].PageNumber);
                if (oldPage != null)
                {
                    //Oldpage Exists
                    List <Page> PageList = existingAnswer.Answers.Find(answer => answer.PersonalData.Email == Pdata_Answer.PersonalData.Email).Pages;
                    foreach (var page in PageList)
                    {
                        if (page.PageNumber == Pdata_Answer.Pages[0].PageNumber)
                        {
                            PageList.Remove(page);
                            break;
                        }
                    }
                    existingAnswer.Answers.Find(answer => answer.PersonalData.Email == Pdata_Answer.PersonalData.Email).Pages = PageList;
                }
                existingAnswer.Answers.Find(answer => answer.PersonalData.Email == Pdata_Answer.PersonalData.Email).Pages.Add(Pdata_Answer.Pages[0]);
                _answers.Delete(answer => answer.SurveyId == id);
                _answers.Insert(existingAnswer);
            }
        }
        public void SendPersonalData(SentPersonalData data, int id)
        {
            SentAnswer existingAnswer = _answers.FindOne(ans => ans.SurveyId == id);

            if (existingAnswer == null)
            {
                //Survey not exists
                SentAnswer answer = new SentAnswer()
                {
                    SurveyId         = id,
                    CompletedCounter = 0,
                    LeftCounter      = 0,
                    Answers          = new List <SentPersonalData_Answers>()
                };
                SentPersonalData_Answers PData = new SentPersonalData_Answers()
                {
                    PersonalData = new SentPersonalData()
                    {
                        Age    = data.Age,
                        Name   = data.Name,
                        Email  = data.Email,
                        Gender = data.Gender
                    },
                    Pages = new List <Page>()
                };
                answer.Answers.Add(PData);
                _answers.Insert(answer);
            }

            else
            {
                //Survey Exists
                var existingData = existingAnswer.Answers.Find(answer => answer.PersonalData.Email == data.Email);
                if (existingData == null)
                {
                    //Person not exists
                    existingAnswer.Answers.Add(
                        new SentPersonalData_Answers()
                    {
                        PersonalData = new SentPersonalData()
                        {
                            Age    = data.Age,
                            Name   = data.Name,
                            Email  = data.Email,
                            Gender = data.Gender
                        },
                        Pages = new List <Page>()
                    });
                    _answers.Delete(answer => answer.SurveyId == id);
                    _answers.Insert(existingAnswer);
                }
                else
                {
                    return;
                }
            }
        }