how to trigger an event from the code in c#?

  private void Form1_Load(object sender, EventArgs e)

        {

            //define Event handler Handler

            button1.Click +=new EventHandler(button1_Click);

        }

        //define method Which will run when you click button

        public void button1_Click(Object Sender, EventArgs e)

        {

            //Write Whatever you want to perform on button Click

        }