private void ButtonAnswer(object sender, EventArgs e)
{
Button btn = (Button)sender;
int medicineID = Int32.Parse(btn.ClassId);
if (btn.BackgroundColor == Color.LimeGreen)
{
controller.DeleteUserMedicine(medicineID);
btn.BackgroundColor = Color.Default;
}
else
{
controller.AddUserMedicine(medicineID);
btn.BackgroundColor = Color.LimeGreen;
}
}