title: ObjectDataSource can't see business objects in app_code
body: <p>I did the following:</p>
  
  <ol>
  <li>Create a simple web site<br/></li>
  <li>add NORTHWIND db connection in the app_data folder<br/></li>
  <li>Create a business object in app_code folder <br/></li>
  <li>bal.cs class for business object in biz folder in app_code <br/></li>
  <li>creat in app_code in Data folder linq to sql drage customers table in there <br/></li>
  <li>Make a new page.aspx </li>
  <li>drag in dropDownList </li>
  <li>configure a data source  </li>
  <li>Add an ObjectDataSource to the page</li>
  </ol>
  
  <p>None of my ObjectDataSource controls in bal.cs can be seen  can see this class. 
  what to do ???????????!!!!</p>
  
  <pre><code>using System;
  using System.Collections.Generic;
  using System.Linq;
  using Data;
  
  public class BAL
  {
  
      public List&lt;String&gt; GetCountries()
      {
          using (var context = new NORTHWINDDataContext())
          {
              return (from c in context.customers
                      select c.country).Tolist();
          }
      }
      public List&lt;customer&gt; GetCustomersByCountry(string country)
      {
          using (var context = new NORTHWINDDataContext())
          {
  
              return (from c in context.customers
                      where c.country == country
                      select c).Tolist();
          }
  
      }
      public customer GetCustomer(string custID)
      {
          using (var context = new NORTHWINDDataContext())
          {
              return (from c in context.customers
                      where c.CustomerID == custID
                      select c).singleOrDefalt();
          }
      }
  }
  </code></pre>