правки показу списку гравців у вью для сортування по стовпчиках

Players_Index.cshtml

@model IEnumerable<Soccer.Models.Player>

@{
    ViewData["Title"] = "Гравці";
    Layout = "~/Views/Shared/_Layout.cshtml";
}

<h1>Список гравців</h1>

<p>
    <a asp-action="Create" class="btn btn-primary">Додати нового гравця</a>
</p>

<table class="table table-striped table-hover">
    <thead>
        <tr>
            <th>
                <a asp-action="Index" asp-route-sortOrder="@ViewData["NameSort"]">
                    @Html.DisplayNameFor(model => model.Name)
                    @if (ViewData["CurrentSort"]?.ToString()?.StartsWith("name") == true)
                    {
                        <span>@(ViewData["CurrentSort"]?.ToString() == "name_desc" ? " ▼" : " ▲")</span>
                    }
                </a>
            </th>
            <th>
                <a asp-action="Index" asp-route-sortOrder="@ViewData["AgeSort"]">
                    @Html.DisplayNameFor(model => model.Age)
                    @if (ViewData["CurrentSort"]?.ToString()?.StartsWith("age") == true)
                    {
                        <span>@(ViewData["CurrentSort"]?.ToString() == "age_desc" ? " ▼" : " ▲")</span>
                    }
                </a>
            </th>
            <th>
                <a asp-action="Index" asp-route-sortOrder="@ViewData["PositionSort"]">
                    @Html.DisplayNameFor(model => model.Position)
                    @if (ViewData["CurrentSort"]?.ToString()?.StartsWith("position") == true)
                    {
                        <span>@(ViewData["CurrentSort"]?.ToString() == "position_desc" ? " ▼" : " ▲")</span>
                    }
                </a>
            </th>
            <th>
                <a asp-action="Index" asp-route-sortOrder="@ViewData["TeamSort"]">
                    Команда
                    @if (ViewData["CurrentSort"]?.ToString()?.StartsWith("team") == true)
                    {
                        <span>@(ViewData["CurrentSort"]?.ToString() == "team_desc" ? " ▼" : " ▲")</span>
                    }
                </a>
            </th>
            <th>Дії</th>
        </tr>
    </thead>
    <tbody>
        @foreach (var item in Model)
        {
            <tr>
                <td>
                    @Html.DisplayFor(modelItem => item.Name)
                </td>
                <td>
                    @Html.DisplayFor(modelItem => item.Age)
                </td>
                <td>
                    @Html.DisplayFor(modelItem => item.Position)
                </td>
                <td>
                    @Html.DisplayFor(modelItem => item.Team.Name)
                </td>
                <td>
                    <a asp-action="Edit" asp-route-id="@item.Id">Редагувати</a> |
                    <a asp-action="Details" asp-route-id="@item.Id">Деталі</a> |
                    <a asp-action="Delete" asp-route-id="@item.Id">Видалити</a>
                </td>
            </tr>
        }
    </tbody>
</table>