In thebeerhouse project you just have to write

foreach(Article article in ViewData.Model)

but I have to write foreach(TheBeerHouse.Models.Article article in ViewData.Model)

for it to know what I mean. Why is that?

Make sure to add a reference in your web.config. This will allow you to omit TheBeerHouse.Models in your web pages.

<namespaces>
....
<add namespace="TheBeerHouse.Models"/>
</namespaces>

Also, you don't have to use ViewData.Model you can just use Model