Hello Abdou,
Thank you for the provided image.
I have tested the described scenario and I reproduced the exception with Xamarin
.Forms 3.5 when RadListView and RadTreeView controls are used.
I have logged this issue on your behalf in our Feedback portal and you could follow the item on the provided link below:
https://feedback.telerik.com/xamarin/1386786-listview-android-exception-is-thrown-when-building-with-xf-3-5
You can find your Telerik points updated for bringing this to our attention. I can assure you that I have raised its priority and a fix for it will be provided in the next minor release.
Currently, the workaround I
could suggest you use the Xamarin.Forms 3.4.
Let me know if you have any additional questions or concerns.
Regards,
Sisi
Progress Telerik
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