A strange issue: I've installed the IIS (7.5) Url Rewriter module in order to apply some url rewrite rules to an Asp.Net 3.5 WebForms application.
Recently I've moved these rules in a separate configuration file, as explained here and here.
So in the web.config I've
<rewrite>
<rules configSource="rewriteRules.config" />
</rewrite>
All works fine, the project compiles and run with no problems, but the VS xml editor marks the attribute configSource
as undeclared...
Any idea of why?