how to get list of all countries in world through

问题:

I am working on a project and in the registration page I want to get a list of all countries in a dropdown list through google API. i used cultureInfo but it get list of just unik 127 countries. i want to use google Map API. Can anyone please show me what I need to do in the Controller, the View and model or whatever is required ? I have a view of the registraion page

@model Retail_MVC.Models.registration
@{

    Layout = null;
}

<div class="my_wrapper">
         <div class="my_left_box">
            @Html.LabelFor(model => model.username)
         </div>
         <div class="my_right_box">
           <input type="text" id="txtusername" name="UserName"/>         
         </div>

   </div>
  -- here i want to get dropdownlist for all countries--