Generic.xaml must have a build action of Page

I was in a code review session and was getting a constant problem with the default (generic) theme for a control. The file generic.xaml was correctly located in the /Themes folder and the Assembly attribute ThemeInfo was also set. But still the control was not showing up !

Problem : generic.xaml had a build action other than Page.

Solution : Make the build action of generic.xaml as Page

I am not sure how it got changed in the first place but if you ever run into a problem with blank custom controls, do check the build action of generic.xaml.

It must be Page.

Of course you also need to make sure you have a generic.xaml in /Themes and it has a Style for your custom control. Also your AssemblyInfo.cs file needs to have a ThemeInfo assembly attribute set.

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