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>This is a Web site - not a web project. I have not set a Namespace.
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>Google searches point me in various contradictory directions (as usual).
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>Some say the namespace for everything in a web site is ASP - If I try ASP._Default I get the same error.
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>I tried adding default="FacilitiesManagement" (that is the site name) to my namespaces section in config.web - same problem - FacilitiesManagement._Default is not defined.
Sorry, not too much experience with web projects. I just did a quick test and the namespace is ASP (assuming you didn't change anything). But I see what you're seeing - the page itself isn't available as a type even with the ASP prefix. I'm guessing this is related to how it dynamically creates assemblies, but to be honest I really don't know. I'd suggest trying the Interface approach instead.