mvc razor dropdownlist selectlistitem

<label class="control-label col-sm-4">Customers</label>

<div class="col-sm-8">

 @{

                                   

    var custLst =new List<SelectListItem>();

    foreach (var item in Model)

    {

        custLst.Add(new SelectListItem() { Text = item.crmCustomerName, Value = item.adepCustomerId });

    }                                

    @Html.DropDownList("erpCustomerId", custLst, "--Choose Customer--", new {id = "adepCustomerId", @class="form-control" })   

 } 

</div>