Nothing happens when I double click on the timer tool on the form

Nothing happens when I double click on the timer tool on the form. How to fix this problem?
(Adding event code problem)

enter image description here

>Solution :

Double click on the (1) below and the designer will create an empty event code

For example

1. Double click

   

2. Designer creates code

   

3. Empty Event

   public partial class Form1 : Form
   {
       public Form1()
       {
           InitializeComponent();
       }
   
       private void timer1_Tick(object sender, EventArgs e)
       {
   
       }
   }