When pressing 1 button, perform a cycle of actions from another button?

Question

C++ / C#

private void button4_Click(object sender, EventArgs e)
        {
            int i;
            for (i = 1; i <= 2; i++)
            {
               
                 
            }
            textBox5.Text = (i).ToString();
        }

It is necessary that when this button is pressed, actions from another button are performed.
In essence, press 1 button, and there will be a cycle that itself will press another button n h times

Answer 1

for (i = 1; i <= 2; i++)
{
  button3_Click(sender, e);
}