how to iterate through a generic list in success of ajax

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C#

Javascript

Ajax

MVC3

In success of ajax I want to append list of customers to UI element, For that I need to iterate through a generic list of customers which the result of ajax success. For this
I have controller method like

public JsonResult GetCustomer(int Id)
       {
           IList<Customer> CustomerList = new List<Customer>();
           CustomerList = db.Customer.Where(b => b.Id== Id).ToList();
           return Json(CustomerList, JsonRequestBehavior.AllowGet);
       }

and,I have wrtitten ajax like

$.ajax({
            type: "POST",
            url: "/Customers/GetCustomer",
            data: { Id: 1 },
            dataType: 'json',
            success: function (response) {
                for (var i = 0; i < response.CustomerList.length; i++) {
                   $("#Customer-tabs").append('<li id=li_' + i + '><a>' + response.CustomerList[i].Name+ '</a></li>');
                }                
            }
        });

What is going wrong in above code?
please suggest a solution.