Hi mahesh213,
Check this example. Now please take its reference and correct your code.
Controller
public class HomeController : Controller
{
    // GET: Home
    public ActionResult Index()
    {
        return View();
    }
    public JsonResult GetCustomers()
    {
        List<Customer> customers = new List<Customer>();
        customers.Add(new Customer { Id = 1, Name = "John Hammond", StartDate = DateTime.Now, EndDate = DateTime.Now });
        customers.Add(new Customer { Id = 2, Name = "Mudassar Khan", StartDate = DateTime.Now.AddDays(-5), EndDate = DateTime.Now });
        customers.Add(new Customer { Id = 3, Name = "Suzanne Mathews", StartDate = DateTime.Now.AddDays(-6), EndDate = DateTime.Now });
        customers.Add(new Customer { Id = 4, Name = "Robert Schidner", StartDate = DateTime.Now.AddDays(-3), EndDate = DateTime.Now });
        return Json(customers, JsonRequestBehavior.AllowGet);
    }
    public class Customer
    {
        public int Id { get; set; }
        public string Name { get; set; }
        public DateTime StartDate { get; set; }
        public DateTime EndDate { get; set; }
    }
    public JsonResult UpdateCustomer(Customer customer)
    {
        return null;
    }
}
View
@{
    Layout = null;
}
<!DOCTYPE html>
<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Index</title>
    <link rel="stylesheet" href="https://kendo.cdn.telerik.com/2020.1.114/styles/kendo.default-v2.min.css" />
    <script type="text/javascript" src="https://code.jquery.com/jquery-1.12.4.min.js"></script>
    <script type="text/javascript" src="https://kendo.cdn.telerik.com/2020.1.114/js/angular.min.js"></script>
    <script type="text/javascript" src="https://kendo.cdn.telerik.com/2020.1.114/js/kendo.all.min.js"></script>
    <script type="text/javascript">
        var app = angular.module("MyApp", ["kendo.directives"]);
        app.controller("MyController", function ($scope, $window, $http) {
            $scope.mainGridOptions = {
                dataSource: {
                    type: "json",
                    transport: {
                        read: { url: "/Home/GetCustomers" },
                        update: { url: "/Home/UpdateCustomer" }
                    },
                    schema: {
                        model: {
                            id: "Id",
                            fields: {
                                Id: { editable: false, nullable: true, type: "number" },
                                Name: { editable: true, nullable: true, type: "string" },
                                StartDate: { editable: true, nullable: true, type: "date" },
                                EndDate: { editable: true, nullable: true, type: "date" }
                            }
                        }
                    },
                    pageSize: 4,
                    serverPaging: false,
                    serverSorting: false
                },
                editable: "inline",
                sortable: true,
                pageable: true,
                resizeable: true,
                columns: [
                    { field: "Id", title: "Id", width: "50px" },
                    { field: "Name", title: "Name", width: "130px", validation: { required: true } },
                    {
                        field: "StartDate",
                        title: "Start Date",
                        width: "120px",
                        format: "{0:MM/dd/yyyy}",
                        editor: function (container, options) {
                            $('<input name="' + options.field + '" data-bind="value:' + options.field + '" data-format="' + options.format + '" />')
                                .appendTo(container).kendoDatePicker({
                                    change: function (e) {
                                        options.model.StartDate = this._oldText;
                                        $('.k-grid-update').removeAttr('disabled');
                                        $('.start').hide();
                                        var startDate = new Date(new Date(options.model.StartDate).toDateString());
                                        var endDate = new Date(new Date(options.model.EndDate).toDateString());
                                        if (startDate >= endDate) {
                                            $('.k-grid-update').attr('disabled', 'disabled');
                                            $('.start').show();
                                            $('.end').hide();
                                        }
                                    }
                                });
                            $('<div class="start" style="display:none;color:red;"></br>Start date should be less than End date</div>').appendTo(container);
                        }
                    },
                    {
                        field: "EndDate",
                        title: "End Date",
                        width: "120px",
                        format: "{0:MM/dd/yyyy}",
                        editor: function (container, options) {
                            $('<input name="' + options.field + '" data-bind="value:' + options.field + '" data-format="' + options.format + '" />')
                                .appendTo(container).kendoDatePicker({
                                    change: function (e) {
                                        options.model.EndDate = this._oldText;
                                        $('.k-grid-update').removeAttr('disabled');
                                        $('.end').hide();
                                        var startDate = new Date(new Date(options.model.StartDate).toDateString());
                                        var endDate = new Date(new Date(options.model.EndDate).toDateString());
                                        if (startDate >= endDate) {
                                            $('.k-grid-update').attr('disabled', 'disabled');
                                            $('.end').show();
                                            $('.start').hide();
                                        }
                                    }
                                });
                            $('<div class="end" style="display:none;color:red;"></br>End date should be greater than Start date</div>').appendTo(container);
                        }
                    },
                    {
                        title: 'Action',
                        command: [{ name: "edit", text: "Edit", iconClass: "k-icon k-i-hyperlink-open" }]
                    }
                ],
                edit: function (e) {
                    var startDate = GetMMdyyyy(new Date(new Date(e.model.StartDate).toDateString()));
                    var endDate = GetMMdyyyy(new Date(new Date(e.model.EndDate).toDateString()));
                    e.model.StartDate = startDate;
                    e.model.EndDate = endDate;
                }
            };
        })
        function GetMMdyyyy(date) {
            var date = new Date(date);
            var dd = date.getDate();
            var mm = date.getMonth() + 1;
            var yyyy = date.getFullYear();
            return mm + '/' + dd + '/' + yyyy;
        }
    </script>
</head>
<body ng-app="MyApp" ng-controller="MyController">
    <kendo-grid k-options="mainGridOptions" id="tblCustomers"></kendo-grid>
</body>
</html>
Screenshot
