asp.net mvc - Error displaying database values in dropdown box in c# -

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I have a problem on how to display a dropdown list of values ​​in my database in my database table (Categories) There are 2 columns, which are category IDs and titles. The goal is to provide a dropdown list where a user can select the title stored in the table.

Model: 

  received a public partial category category {Public Entity}; Set; } Public string title {get; Set; }}   
 Controller:  
  Public Action Index () {Private Reference DB = New Context (); ViewBag.Category = new selection list (db categories, "id", "title"); See Return (); }   
 See:  
  @ Model MyApp.Models.Category & lt; P & gt; Categories: @ Html.DropDownList ("ID", "Choose a Category") & lt; / P & gt;   
 The error I get is in the scene that says:  
  'IEnumerable & lt; SelectListItem & gt; ' There is no ViewData item of type, whose key is 'ID'    
 
 
 strong> viewbag  and you see that the  "id"  is going through you  class     
 
 
  ViewBag.Category = new SelectList (db.Categories, "id", "title");   
 Try this type:  
  @ html.DropDownList ("category", "select a category")

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