private void priceSearchButton_Click(object sender, EventArgs e)
{
MobileManager _mobileManager = new MobileManager();
Mobile mobile = new Mobile();
int PriceFrom = Convert.ToInt32(priceFromFieldTextBox.Text);
int PriceTo = Convert.ToInt32(priceToFieldTextBox.Text);
mobile.PriceFrom = Convert.ToInt32(priceFromFieldTextBox.Text);
mobile.PriceTo = Convert.ToInt32(priceToFieldTextBox.Text);
resultDataGridView.DataSource = _mobileManager.SearchValue(mobile);
}