<script>

*declare variable*
    var showDatailGreed = [];
    var addMasterPickList = [];
*On button click Event *
 function submit() {
        var t = $('#dataTablepiclist').DataTable();
        t.row.add([
            $("#sono").val(),
            $("#customername").val(),
            $("#deliveryaddress").val(),
            $("#ItemDescription").val(),
            $("#fatchByMaterialCode").find("option:selected").text(),
            $("#DispatchQty").val()
        ]).draw(false);

        var details = {
            SoNo: $("#sono").val(),
            MaterialDescription: $("#ItemDescription").val(),
            MaterialCode: materialCode,
            DispatchQty: $("#DispatchQty").val()
        };
        var masterDetails = {
            SoNo: $("#sono").val(),
            CustomerName: $("#customername").val(),
            DeliveryAddress: $("#deliveryaddress").val(),
        };
        addMasterPickList.push(masterDetails);
        showDatailGreed.push(details);
     }

function saveToDatabase() {
        console.log(showDatailGreed);
        var postData = {
            detailPickList: showDatailGreed,
            masterPickList: addMasterPickList
        }

        $.ajax({
            type: 'POST',
            url: '@Url.Action("SaveMasterPickListData")',
            data: JSON.stringify(addMasterPickList),
            //data: { detailpickList: JSON.stringify(showDatailGreed), masterPickList: JSON.stringify(addMasterPickList)},
            contentType: "application/json: charset=utf-8",
            dataType: "json",
            traditional: true,
            processData: false,
            success: function (result) {

            },
            Error: function () {

            }
        });

 <script>

public ActionResult SaveDetailPickListData(List<SavePickListModel>
    detailpickList)
    {
        savePickList.detailPickList = detailpickList;
        return View("");
    }

using System;
  using System.Collections.Generic;
  using System.Linq;
  using System.Text;
  using System.Threading.Tasks;

  namespace WebService.ViewModel.CreatePickList
  {
     public class SavePickListModel
     {

        public List<DetailPickListModel> detailPickList { get; set; }
        public List<MasterPickListModelcs> masterPickList { get; set; }
     }
  }