Recreating a solution
<p>I'm trying to recreate a solution that had multiple projects in it (only the cs, aspx, etc, remain).  When I create a blank solution and blank project files and start re-adding things, I receive the following compiler errors numerous times:</p>

<p>The type or namespace name 'Activation' could not be found (are you missing a using directive or an assembly reference?)</p>

<p>The Activation class is defined in a Activation.cs file that is in a sub folder to the cs file that is using it.  I've added and included the files in the project...</p>

<p>The website currently works in production as is, so I'm wondering what type of reference I need...</p>

<p>The following is the structure</p>

<ul>
<li><p>Solution</p>

<ul>
<li><p>Project1</p>

<ul>
<li>FileUsingActivation.cs</li>
<li><p>Folder1</p>

<ul>
<li>Activation.cs (which contains the class being used in FileUsingActivation.cs that the compiler is complaining about</li>
</ul></li>
</ul></li>
</ul></li>
</ul>

<p>Edit 1:  Just a note that Visual Studio can't resolve the class name, meaning it currently has a squiggly line under the class1 : Activation (Activation portion).  But the file is definately included in the project, it's just under another sub folder...  I mean I know it won't compile because VS can't resolve the name, but I'm wondering why....</p>

<p>Edit 2:  If I add the file to the root of the project, the class name  highlights blue, the squiggly goes away as does the error....   so I can't keep the existing folder structure in the project for some reason????</p>
