protected void AddToShoppingCart_Click(object sender, EventArgs e)
 
     {
 
 
 
     Button btn = (Button)sender;
 
     if (Session["shoppingCart"]!= null)
 
     {
 
     Session["shoppingCart"] += "," + btn.ToolTip;
 
     }
 
     else
 
     {
 
     Session.Add("shoppingCart", btn.ToolTip);
 
 
 
     }
 
 
 
     // Response.Redirect("shoppingCart.aspx");
 
     }

  protected void AddToShoppingCart_Click(object sender, EventArgs e)
 
     {
 
 
 
     Button btn = (Button)sender;
 
     if (Session["shoppingCart"]!= null)
 
     {
 
     Session["shoppingCart"] += "," + btn.ToolTip;
 
     }
 
     else
 
     {
 
     Session.Add("shoppingCart", btn.ToolTip);
 
 
 
     }
 
 
 
     // Response.Redirect("shoppingCart.aspx");
 
     }