question

Hello.
I have been developing using ASP.NET program language for more than 10 years.
Today the project was so slow that I tried debugging.
Debugging results were very shocking.

I made an empty web project, and I made a webform.aspx
A code that creates a very simple method and executes it in Page_Load.

No events occur except one page call.
But Page_Load was executed twice.

As far as my knowledge is concerned, Page_Load will only be executed once upon loading the first page before the event is issued. This was the basis of ASP.NET C#.
Is my knowledge wrong?

Here the test() method runs twice.
Am I wrong?

---

 public partial class WebForm6 : System.Web.UI.Page
 {
     protected void Page_Load(object sender, EventArgs e)
     {
         test();  <-- calling twice
     }

     private void test() <-- calling twice
     {
         int a = 1;
         int b = 2;
         Response.Write(a * b);
     }
 }

---