Here is a bit of trace from debugging the application when it tries to use an ambedded image (png) as an image source:

 Exception: System.Exception: Could not find the embedded resource in the current assemblies. ImageSource: 'embedded://mauireactortest.resources.images.warp_marker.png/'. Other embedded resources in matching assemblies: 

What I find noteworthy as that there are no other embedded resources found either 9even though I have multiple images under Resources/Images)

You can view the pathes of the embedded images with a tool like dotpeek.

https://www.jetbrains.com/de-de/decompiler/
And the Images should be marked as embbededResource, to be loaded.

Thank you!
After adding a line like this for each image inside my Csproj:
<EmbeddedResource Include="Resources\Images\left_area_marker.png" /> inside an <ItemGroup>, the image shows correctly.
Is there interest for me to add a description of this to the docs?
I was thinking on this page:
https://github.com/Mapsui/Mapsui/blob/main/docs/general/markdown/imagesource.md
To help out other beginners :)

Kind regards,

Julius

Yes would be nice If you could do a pull request or write something for improving the documentation.