Error: 'Cannot create unknown type '{clr-namespace:NameSpace.Properties}Settings'.'

Question

I define my settings and styles in a ResourceDictionary:

Answer 1

As a variation on other answers & comments, this worked for me:

• Set the file's "Build Action" property to "Page".

• Build (problem gone - but...:)

• Set the file's "Build Action" property to "Resource".

• Build

• Problem still gone!

Seems like a VS bug to me.