private void QuestionTypeCollection_SelectedIndexChanged(object sender, EventArgs e)
        {
            foreach (Control obj in Controls)
            {
                if (
                    obj.GetType() == new Panels.QuestionType0().GetType()
                    ||
                    obj.GetType() == new Panels.QuestionType1().GetType()
                    ||
                    obj.GetType() == new Panels.QuestionType3().GetType()
                    )
                {
                    Controls.Remove(obj);
                }
            }
            switch (QuestionTypeCollection.SelectedIndex)
            {
            case 0:
                Panels.QuestionType0 newPanel = new Panels.QuestionType0()
                {
                    Location = new Point(370, 72)
                };
                Controls.Add(newPanel);
                break;

            case 1:
                Panels.QuestionType1 newPanel1 = new Panels.QuestionType1()
                {
                    Location = new Point(370, 72)
                };
                Controls.Add(newPanel1);
                break;

            case 2:
                Panels.QuestionType3 newPanel3 = new Panels.QuestionType3()
                {
                    Location = new Point(370, 72)
                };
                Controls.Add(newPanel3);
                break;

            case 3:
                break;

            case 4:
                break;

            case 5:
                break;
            }
        }
        private void button1_Click(object sender, EventArgs e)
        {
            switch (QuestionTypeCollection.SelectedIndex)
            {
            case 0:
            {
                Panels.QuestionType0 QuestionPanel = Controls.OfType <Panels.QuestionType0>().Single();
                int otvetId = 0;     // id правильного ответа
                for (int i = 0; i < 4; i++)
                {
                    if (QuestionPanel.questionType.RadioButtons[i])
                    {
                        otvetId = i;
                        break;
                    }
                }
                using (ForumContainer container = new ForumContainer())
                {
                    int langId      = LanguageComboBox.SelectedIndex + 1;
                    int questTypeId = QuestionTypeCollection.SelectedIndex + 1;

                    QuestionSet setQuest = new QuestionSet()
                    {
                        QuestionText               = QuestText.Text,
                        CorrectOption              = otvetId,
                        LanguageLanguageId         = langId,
                        QuestionTypeQuestionTypeId = questTypeId,
                        AccountAccountId           = 0,
                        AccountSet      = container.AccountSet.Single(x => x.Login == "admin"),
                        QuestionTypeSet = container.QuestionTypeSet.Single(x => x.QuestionTypeId == questTypeId),
                        LanguageSet     = container.LanguageSet.Single(x => x.LanguageId == langId),
                    };

                    container.QuestionSet.Add(setQuest);

                    for (int i = 0; i < 4; i++)
                    {
                        AnswerSet secAnswer = new AnswerSet()
                        {
                            AnswerVarible = QuestionPanel.questionType.TextBoxes[i],
                            QuestionSet   = setQuest
                        };
                        container.AnswerSet.Add(secAnswer);
                        container.SaveChanges();
                    }
                    container.SaveChanges();
                }
            }
            break;

            case 1:
            {
                Panels.QuestionType1 QuestionPanel = Controls.OfType <Panels.QuestionType1>().Single();
                string otvetId = "";     // id правильного ответа
                for (int i = 0; i < 4; i++)
                {
                    if (QuestionPanel.questionType.CheckBox[i])
                    {
                        otvetId += i;
                    }
                }
                using (ForumContainer container = new ForumContainer())
                {
                    int langId      = LanguageComboBox.SelectedIndex + 1;
                    int questTypeId = QuestionTypeCollection.SelectedIndex + 1;

                    QuestionSet setQuest = new QuestionSet()
                    {
                        QuestionText               = QuestText.Text,
                        CorrectOption              = Convert.ToInt32(otvetId),
                        LanguageLanguageId         = langId,
                        QuestionTypeQuestionTypeId = questTypeId,
                        AccountAccountId           = 0,
                        AccountSet      = container.AccountSet.Single(x => x.Login == "admin"),
                        QuestionTypeSet = container.QuestionTypeSet.Single(x => x.QuestionTypeId == questTypeId),
                        LanguageSet     = container.LanguageSet.Single(x => x.LanguageId == langId),
                    };

                    container.QuestionSet.Add(setQuest);

                    for (int i = 0; i < 4; i++)
                    {
                        AnswerSet secAnswer = new AnswerSet()
                        {
                            AnswerVarible = QuestionPanel.questionType.TextBoxes[i],
                            QuestionSet   = setQuest
                        };
                        container.AnswerSet.Add(secAnswer);
                        container.SaveChanges();
                    }
                    container.SaveChanges();
                }
            }
            break;

            case 2:

                break;

            case 3:

                break;

            case 4:

                break;
            }
        }