private void btnUpdate_Click(object sender, EventArgs e)
        {
            var en = new ManageAdminEntity();
            var re = new ManageAdminRepo();

            if (ValidateToUpdate() == true)
            {
                en.Id        = txtAid.Text;
                en.Name      = txtAname.Text;
                en.Age       = txtAage.Text;
                en.Sex       = txtAsex.Text;
                en.Reference = txtAreference.Text;
                en.Phone     = txtAphone.Text;
                en.Address   = txtAaddress.Text;

                if (MessageBox.Show("Are you sure ??", "Confirmation", MessageBoxButtons.YesNo) == DialogResult.No)
                {
                    return;
                }
                else
                {
                    re.Update(en);
                }
            }
            else
            {
                MessageBox.Show("Invalid Input");
            }
        }