Thank you for contacting us.
I have tested the Theming example from our WPF examples
. I have also tested the corresponding Theming online example
from our Silverlight demos. As a result I was not able to reproduce the issue with any of the available themes. Do you reproduce the issue with any of these examples on your side? If you are not using any custom modified theme in your project the page border should be rendered with a single WPF Border
instance. In this case the disappearance of the lines may be cause by some additional property that may be set in your code.
If you are not able to reproduce the issue with any of our examples, it would be useful if you could send us a simplified demo project that reproduces it. This way we will be able to investigate the issue on our side as well.
I am looking forward to contacting you.
the Telerik team
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