@Html.DropDownListFor How to add option?

Question

@Html.DropDownListFor(model => model.ZipFile, new SelectList(ViewBag.ZipFiles))

The above code creates me a select list just fine. But I want to

Answer 1

By using the proper DropDownListFor overload:

@Html.DropDownListFor(
    model => model.ZipFile, 
    new SelectList(ViewBag.ZipFiles),
    "-- please select a zip file --"
)