private void button1_Click(object sender, EventArgs e)
        {
            if (name.Text == "" || surname.Text == "" || age.Text == null || entryDate == null)
                MessageBox.Show("Please enter all the data before pressing Add");
            else
            {
                mamaDataSet.PacientRow pr;
                int maxId;
 
                maxId = -1;
                foreach (mamaDataSet.PacientRow r in mamaDataSet.Pacient.Rows)
                {
                    if (r.PacientId > maxId) maxId = r.PacientId;
                }
                maxId = maxId + 1;
 
                pr = (mamaDataSet.PacientRow)mamaDataSet.Pacient.NewRow();
                pr.PacientId = maxId;
                pr.Name = name.Text;
                pr.Surname = surname.Text;
                bool b=false;
                try
                {
                    pr.Age = int.Parse(age.Text);
                }
                catch (Exception es)
                {
                    MessageBox.Show("Invalid age, please insert a number");
                    b = true;
                }
                if (b != true)
                {
                    DateTime startD = entryDate.SelectionStart;
                    pr.EntryDate = startD;
                    mamaDataSet.Pacient.Rows.Add(pr);
                    //daProducts.Update(dsStore1, "Products");
                    MessageBox.Show(maxId.ToString());
                    pacientTableAdapter.Update(mamaDataSet);
                }
            }
        }