@model HelloWorldMvcApp.SampleViewModel
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Bootstrap 101 Template</title>
<link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css">
.field-validation-error {
List<SelectListItem>dateEcheancierCc = new List<SelectListItem>();
string[] arrayDateEcheancierCc=new[]{"abc","def","ghi","Selected-value-by-default"};
foreach (var dateEch in arrayDateEcheancierCc)
new SelectListItem() { Text = dateEch, Value = dateEch }
<div class="md-select px-0" style="min-width:0px">
@Html.DropDownList("DateEche",new SelectList(dateEcheancierCc,"Value","Text","Selected-value-by-default"), new { @class = "form-conrol" })