Exception on ShowDialog Method

[Progiscad]

Hello,

I have a problem when I use the ShowDialog method on a new thread and only in Net 8, I do not have the problem in Net Standard.

Can you help me please ?

I join a visual studio project net 8 join here :
testmodal.zip
Thank.

[punker76]

@Progiscad If I add the missing styles and resources to your sample everything is working: https://mahapps.com/docs/guides/quick-start#mahapps-build-in-styles-and-themes

[Progiscad]

Thank you very much and sorry for this oversight