MVC Core.

JS:

var currentSelection = [];

function selection_changed(selectedItems) {
    var dataGrid = $("#myContainer").dxDataGrid("instance");
    var data = selectedItems.selectedRowsData;

    if (data.length > 0) {
        currentSelection = data
            .map((value) => `${value.Name}`)
    } else {
        currentSelection = [];
    };
}

function create(e) {
    $.ajax({
        url: "@Url.Action("Register", "MyController")",
        contentType: "application/json; charset=utf-8",
        dataType: 'json',
        type: 'POST',
        data: JSON.stringify(currentSelection),
        success: function (response) {
            showToast("success");
        },
        error: function (xhr, status, error) {
            showToast("error");
        }
    });
}

Unprocessed request looks like:

["Name1","Name2"]

C#

   [HttpPost]
   public virtual ActionResult Register(object currentSelection)

I have tried without JSON.stringify, setting data: {currentSelection: JSON.stringify(currentSelection)}
, tried adding this traditional: true
Also i have tried adding [FromBody] to controller, instead of object tried List<string> or string[].

Nothing is working. I’m getting HTTP400 everytime. When i changed code to GET request without any data etc., everything is working, so no URL/communication issues

Can someone help me with this?