private void addCommentBtn_Click(object sender, EventArgs e)
        {
            if (new ItemCheck(nameSurnameEmailComboBox.SelectedItem, moviesComboBox.SelectedItem, commentTxtBox.Text, commentDateTimePicker.Value).CommentCheck() == true)
            {
                //error, do nothing
            }
            else
            {
                if (MessageBox.Show("Do you want to add this comment to database?", "Question", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
                {
                    string   name       = nameSurnameEmailComboBox.SelectedItem.ToString().Split(' ')[0];
                    string   secondName = nameSurnameEmailComboBox.SelectedItem.ToString().Split(' ', ',')[1];
                    string   email      = nameSurnameEmailComboBox.SelectedItem.ToString().Substring(nameSurnameEmailComboBox.SelectedItem.ToString().LastIndexOf(',') + 2);
                    string   movieTitle = moviesComboBox.SelectedItem.ToString();
                    string   contents   = commentTxtBox.Text;
                    DateTime addDate    = commentDateTimePicker.Value;

                    BsonDocument _document = DBItem.Comment(name, secondName, email, movieTitle, contents, addDate);

                    NewComment = _document;
                    MovieTitle = movieTitle;
                    UserEmail  = email;

                    this.DialogResult = DialogResult.Yes;
                }
                else
                {
                    //do nothing
                }
            }
        }