how to save multiple records by clicking single button. using MVC Core

Dear Sir

I am developing application in asp.net mvc core.I want to save multiple records by single save button

I used "https://www.aspsnippets.com/Articles/Insert-Save-Multiple-rows-records-to-database-using-Entity-Framework-in-ASPNet-MVC.aspx"

In the code everything is working fine but in customers.push(customer), customers as parameter do not  have values in server side.It is showing count 0 in " InsertCustomers" function in customercontroller

i have given code below.

Please help me Sir

Below file is Views/Customers/Index.cshtml

 <script type="text/javascript">

        var customers = new Array();
        $("body").on("click", "#btnAdd", function ()
        {

           
            var Name = $("#txtName").val();
            var Country = $("#txtCountry").val();
            var tBody = $("#tblCustomers > TBODY")[0];
            var row = tBody.insertRow(-1);
            //Add Name cell.
            var cell = $(row.insertCell(-1));
            cell.html($('#txtName').val());
            //Add Country cell.
            cell = $(row.insertCell(-1));
            cell.html($('#txtCountry').val());
            //Add Button cell.
            cell = $(row.insertCell(-1));
            var btnRemove = $("<input />");
            btnRemove.attr("type", "button");
            btnRemove.attr("onclick", "Remove(this);");
            btnRemove.val("Remove");
            cell.append(btnRemove);
            //Clear the
            $("#txtName").val("")
            $("#txtCountry").val("")

        });

        function Remove(button) {
            //Determine the reference of the Row using the Button.
            var row = $(button).closest("TR");
            var name = $("TD", row).eq(0).html();
            if (confirm("Do you want to delete: " + name)) {
                //Get the reference of the Table.
                var table = $("#tblCustomers")[0];
                //Delete the Table row using it's Index.
                table.deleteRow(row[0].rowIndex);
            }
        };
        $("body").on("click", "#btnSave", function () {
            //Loop through the Table rows and build a JSON array.
            alert();
            var customers = new Array();
            $("#tblCustomers TBODY TR").each(function () {
                var row = $(this);
                var customer = {};
                customer.Name = row.find("TD").eq(0).html();
                customer.Country = row.find("TD").eq(1).html();
                customers.push(customer);
            });

            $.ajax({

                type: "POST",
                url: "/Home/InsertCustomers",
                data: JSON.stringify(customers),
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: function (r) {
                    alert(r + " record(s) inserted.");
                }
            })
        });


    </script>

 Below file is in customercontroller , function name is Insertcustomers

   [Route("Customers/InsertCustomers")]   
        public JsonResult InsertCustomers(List<Customer> customers)// not getting values in customers
        {
            using (DBEmployeeContext entities = new DBEmployeeContext())
            {
                //Truncate Table to delete all old records.
              //  int a= await Context.Database.ExecuteSqlCommandAsync("DELETE FROM [Blogs]");

                //Check for NULL.
                if (customers == null)
                {
                    customers = new List<Customer>();
                }

                //Loop and insert records.
                foreach (Customer customer in customers)
                {
                    entities.Customer.Add(customer);
                }
                int insertedRecords = entities.SaveChanges();
                return Json(insertedRecords);
            }
        }

 Model is

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;

namespace WebApplication29.Models
{
    public partial class Customer
    {
        [Key]
        public int CustomerId { get; set; }
        public string Name { get; set; }
        public string Country { get; set; }
    }
}

Thanks

Chandran