private void button2_Click(object sender, EventArgs e)
        {
            FormAttractionIdInput formAttractionIdInput = new FormAttractionIdInput();

            formAttractionIdInput.ShowDialog();
            if (formAttractionIdInput.allAttraction)
            {
                checkedAttractions.Clear();
                checkedAttractions.AddRange(attractions);
            }
            else
            {
                checkedAttractions.Add(attractions.Find(y => (((int)y.id) == formAttractionIdInput.attractionId)));
            }
            label1.Text = "Выбрано аттракциов : " + checkedAttractions.Count;

            fillAttractionDataGridView(checkedAttractions);
        }
        private void button3_Click(object sender, EventArgs e)
        {
            FormAttractionIdInput formAttractionIdInput = new FormAttractionIdInput();

            formAttractionIdInput.ShowDialog();
            if (formAttractionIdInput.allAttraction)
            {
                checkedAttractions.Clear();
            }
            else
            {
                if (formAttractionIdInput.attractionId > 0)
                {
                    checkedAttractions.RemoveAt(attractions.IndexOf(attractions.Find(x => (int)x.id == formAttractionIdInput.attractionId)));
                }
            }
            label1.Text = "Выбрано аттракциов : " + checkedAttractions.Count;

            fillAttractionDataGridView(checkedAttractions);
        }