How to create MVC 4 @Html.TextBox type="file"?

I need to add the following field at my form

<input type="file" class="input-file" />

I create model and describe this field (the last field)

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Web;

 namespace CorePartners_Site2.Models
 {
     public class FeedbackForm
     {
    public string Name { get; set; }
    public string Email { get; set; }
    public string Phone { get; set; }
    public string Company { get; set; }
    public string AdditionalInformation { get; set; }
    public HttpPostedFileBase ProjectInformation { get; set; }
     }
 }

and create

@Html.TextBox(null, null, new { type="file", @class="input-file" })

but it doesnt work, I get some exception. What's wrong?