I have completed some skinning for DNN 5.x and have been editing the ascx's directly.  The include shown below works fine for DNN alone but now I want to develop a module using C# and VS2008.  I was following http://www.codeproject.com/KB/aspnet/DNNLINQtoSQL.aspx.

Now I try to build the entire DNN installation for this development preparation.  The build in VS2008 fails because I am using the following method to include common header and footer content in myskina.ascx:

< %@ Control Language="vb" AutoEventWireup="false" Explicit="True" Inherits="DotNetNuke.UI.Skins.Skin" % >
< %@ Register TagPrefix="dnn" TagName="LOGIN" Src="~/Admin/Skins/Login.ascx" % >
< %@ Register TagPrefix="dnn" TagName="NAV" Src="~/Admin/Skins/Nav.ascx" % >
< %@ Register TagPrefix="dnn" TagName="STYLES" Src="~/Admin/Skins/Styles.ascx"  %>
...
< ! -- end #contentholder -- >
< ! --#include file="common.ascx"-- >

What is the proper way to combine ascx files to comprise a complete skin? 

The build errors I find are when the build attempts to compile the specific client skins folders I have added into my development DNN.

Using the example above, when the build reaches common.ascx it claims: Unknown server tag 'dnn:NAV'.

However, if I put the <%@Register %> directive in the common.ascx, then I receive the error that a control cannot be registered twice.

Next I tried removing all directives from the top of the myskins[a-z].ascx that include common.ascx and inserting them at the top of common.ascx. In the myskin[a-z].ascx files, I put a <%@Reference %> directive into common.ascx. Now the error is back to Unknown server tag 'dnn:nav', presumeably because the tag in myskina.ascx appears before it is registered in common.ascx (which is included at the bottom for SEO purposes).

Regards,
G..L