Rajeev Pentyala – Technical Blog on Power Platform, Azure and AI

These days I started practicing windows phone 8 applications.
In my first application, I tried to call a number using Windows Phone Stack using below code.

PhoneCallTask phoneCallTask = new PhoneCallTask();

phoneCallTask.PhoneNumber = “1234567890”;

phoneCallTask.DisplayName = “Rajeev”;

phoneCallTask.Show();

While executing the code block I got below exception

An unhandled exception of type ‘System.UnauthorizedAccessException’ occurred in System.Windows.ni.dll

Fix

• We have to enable ‘Phone Dialer’ capability in ‘WMAppManifest.xml’ file
• In the Project ,open ‘WMAppManifest.xml’ file under ‘Properties’ folder
• Go to ‘Capabilities’ tab and check ‘ID_CAP_PHONEDIALER’ check box.

App Manifest file

• Each Windows Phone app has a manifest file that contains details about the app, such as the App ID and the capabilities that the app uses.