ASP .net get hidden value from code behind in page_load function

Question

I have a hidden field that I set in my javascript code:

Answer 1

   

      
  
    
 

 protected void Page_Load(object sender, EventArgs e)
 {
        if ( !Page.IsPostBack)
        {
           Hidden1.Value = "Some Val";
        }
        else
        {
           string message =Hidden1.Value;
           // remaining code
        }
 }