Select tag helper in a list

Hi,

I have a form with a list of objects (DayList). in each list item I like to use a select tag helper to alter the selected shift

This is my model:

public string ScheduleName { get; set; }
public bool NameChanged { get; set; }
public string Message { get; set; }

public class ScheduleDay
        {
            public int DayNr { get; set; }
            public Shift Shift { get; set; }
            public bool Changed { get; set; }
        }

public List<ScheduleDay> DayList { get; set; }
public List<SelectListItem> ShiftList { get; set; }


public void OnGet(int ScheduleId)
        { 
          //Get all data from Database.
        }

In My cshtml file I want to do this:

<table id="scheduleTable"><tr><th width="100px">
                    Day</th><th width="100px">
                    Date</th><th widht="100px">
                    Schift</th></tr>
            @foreach (var item in Model.DayList)
            {<tr><th width="100px">
                        @Html.DisplayFor(modelItem => item.DayNr)</th><th width="100px">
                        Date</th><th width="100px"><select asp-for="item.Shift.ShiftId" asp-items="@Model.ShiftList"></select></th></tr>
            }</table>

But I get the error message "Model does not contain a definition for "item" ...

How should I do this ?