Hello, I have 3 apps which work fine in windows phone 8. Now that windows phone 8.1 is out, I tried to make it available for that also. Out of the 3 apps, 2 apps are working fine in windows phone 8.1. I didn't even have to retarget my apps. But one of my app is not working in this platform. I even tried retargeting the app to 8.1 but still, it doesn't work. I get an unknown error and the app exits saying it's an unhandled exception. Can anyone help me resolve this issue please? Any help will be apprecited. Thank you.