protected void Button3_Click(object sender, EventArgs e)
{
StackPool <Person> pStackPool = new StackPool <Person>();
pStackPool.Store(new Person());
pStackPool.Store(new Person());
Person p1 = pStackPool.Fetch();
Person p2 = pStackPool.Fetch();
this.TextBox1.Text += string.Format($"\r\nThe Stack class implements a Last in First Out data structure. Push() and Pop()");
}