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# Steps to reproduce
I created a repo of the issue here: https://github.com/TheBigRic/UWP-Xamarin-test
Basically the reproduction is creating a master-detail example from the VS2017 templates.
Change the template code in App.xaml.cs of the UWP project from this:
Frame rootFrame = Window.Current.Content as Frame;
if (rootFrame == null)
rootFrame = new Frame();
Window.Current.Content = rootFrame;
if (rootFrame.Content == null)
Window.Current.Content = new MainPage();
The App will crash with an unhandled exception, without stacktrace nor inner exceptions.
The exception is a `DirectoryNotFoundException` with as message:
The system cannot find the path specified.
When an icon is specified for the ToolBarItem it will work when the rootelement is a page.
The same setup with a UWP native App works without setting an icon and the root is a page.
Thank you for filing this report! I am able to reproduce this issue with the GitHub project in the description. I tested with 126.96.36.199 and 2.3.5-pre5 and it crashed on both. I am confirming this report so we can investigate further.