<div class="nav pull-right checkbox navbar-btn">
                @Html.CheckBox("ShowInactive", false) Show Inactive
</div>

<script type="text/javascript">
    $(document).ready(function () {
        $("#ShowInactive").prop("checked", @HttpContext.Current.Application["ShowInactive"]);
        $("#ShowInactive").click(function () {
            if (this.checked) {
                @HttpContext.Current.Application["ShowInactive"] = true;
            }
            else
            {
                @HttpContext.Current.Application["ShowInactive"] = false;
            }
            //This is to make the grid reload after the checkbox is changed.
            location.reload();
        });
    });
</script>

public static class GlobalVariables
{
    public static bool ShowInactive
    {
        get { return (bool)HttpContext.Current.Application["ShowInactive"]; }
        set { HttpContext.Current.Application["ShowInactive"] = value; }
    }
}