private void materialRaisedButton1_Click(object sender, EventArgs e)
{
Account_staff ac = new Account_staff(this);
this.Hide();
ac.Show();
this.Close();
}
private void login_Click(object sender, EventArgs e)
{
if (valuesValidity())
{
return;
}
Account_staff staff = new Account_staff(this);
staff.Show();
this.Hide();
}