C# web project complaining about a class
<p>I created a new project (web project in C#).
Created a new folder in my project called App_Code.
I then proceeded to add a class with the following:</p>

<pre><code>using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using Shipper.DataLayer;

namespace Shipper.BusinessLayer
{
    public static class BL
    {
        public static int JustSomeTest()
        {
            return 1;
        }
    }
}
</code></pre>

<p>And in one of my pages <code>default.aspx</code> in the code behind I tried to do:</p>

<p><code>int i = BL.JustSomeTest();</code></p>

<p>I am not getting any intellisense when I type in <code>BL.</code>.  It says I am missing an assembly or reference.  Or it will say <code>The name BL does not exist in the current context</code>.
But do I have to include a reference if the class file is in the same project?  I even tried to Build my project and it at first generated a dll file with the name of my solution file, <code>Shipper.dll</code> but as soon as I add this reference it says <code>The name BL does not exist in the current context</code>.</p>

<p>In my default.aspx page I've tried to add a using statement </p>

<p><code>using Shipper.</code></p>

<p>But as soon as I do that my namespace BusinessLayer is not shown...
Im confused?</p>

<p><H1>Edit</H1></p>

<p>Here is default.aspx:</p>

<pre><code>using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Shipper.BusinessLayer;

namespace Shipper
{
    public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!Page.IsPostBack)
            {
                SetDefaults();
                int i = BL.JustSomeTest();
            }
        }
   }
}
</code></pre>

<p>Here is my <code>BL.cs</code> file:</p>

<pre><code>using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using Shipper.DataLayer;

namespace Shipper.BusinessLayer
{
    public static class BL
    {
        public static int JustSomeTest()
        {
            return 1;
        } 
    }
}
</code></pre>

<p>The error reads <code>The type or namespace name</code>BusinessLayer<code>does not exist in the namespace Shipper (are you missing an assembly reference)?</code></p>
