Json在asp.net MVC中不起作用

Question

I wanna to use this json to my sites shopping cart .it works well in visual studio 2017 but in visual studio 2013 it does not work. please help me to solve it.

function AddtoCart() {
  $.ajax({
    url: '/Home/AddToCart',
    type: 'POST',
    dataType: 'Json',
    data: {
      ProductID: @Model.product.id,
      count: My_Count.value
    },
    error: function(err) {
      alert(err.status);
    }
  }).done(function(data) {
    $('#Total_Cost').text(data.Total_Price)
    var Text = "";
    $.each(data.lst_ShoppingCart, function(index, val) {
      Text += "<tr><td class='col-sm-8 col-md-6' ><span id='Product_Name'>" + val.Product_Name + "</span></td ><td class='col-sm-1 col-md-1' style='text-align: center'><input type='text' class='form-control' id='exampleInputEmail1' value='" + val.Count + "'></td><td class='col-sm-1 col-md-1 text-center'><span id='Product_Cost'>" + val.Single_Price + "</span></td><td class='col-sm-1 col-md-1 text-center'><span id='Total_ProCost'>" + val.Price + "</span></td><td class='col-sm-1 col-md-1'><button type='button' onclick='RemoveCart(" + val.ID + ")' class='btn btn-danger'>Remove</button></td></tr>";
    })
    $('#Pro_Cart').html(Text);
  });
}

also I know that this part of code not working:

url: '/Home/AddToCart',
  type: 'POST',
  dataType: 'Json',
  data: {
    ProductID: @Model.product.id,
    count: My_Count.value
  },

</div>