private void button2_Click_1(object sender, EventArgs e)
        {
            Symptom_List a = new Symptom_List();

            if (textBox2.Text != string.Empty)
            {
                a.Name = textBox2.Text;
                h.Symptom_Lists.InsertOnSubmit(a);
                h.SubmitChanges();
                GridViewUpdate();
            }
            else
            {
                MessageBox.Show("Please insert Name of Symptom !!!");
            }
        }
 partial void UpdateSymptom_List(Symptom_List instance);
 partial void DeleteSymptom_List(Symptom_List instance);
 partial void InsertSymptom_List(Symptom_List instance);