Using Windows.Devices.SmartCards API give 'System.UnauthorizedAccessException'

Question

Hi everybody,
In the past I used the Windows.Devices.SmartCards APIs for Windows Phone 8.1 with success (https://msdn.microsoft.com/en-us/library/windows/apps/windows.devices.smartcards.aspx).
Now i want to use the same APIs to connect my PC (Windows 8.1) to a SmartCardReader (e.g. ACR122) and read some data from a SmartCard.
Unfortunately, when i use those APIs, a System.UnauthorizedAccessException is launched.
How can i resolve it?
Many thanks!
This is the code:
private async Task getSmartCardReader()
string selector = SmartCardReader.GetDeviceSelector(SmartCardReaderKind.Generic);
DeviceInformationCollection devices = await DeviceInformation.FindAllAsync(selector);
Debug.WriteLine("Number of devices: "+devices.Count.ToString());
if (devices != null && devices.Count != 0)
foreach (DeviceInformation s in devices)
try
Debug.WriteLine("Device Id: "+s.Id);
Debug.WriteLine("Device Name: " + s.Name);
Debug.WriteLine("Is Device Enabled: " + s.IsEnabled);
//Here is the line that launches exception
SmartCardReader reader = await SmartCardReader.FromIdAsync(s.Id);
catch (Exception e) {
Debug.WriteLine(e.StackTrace);

Answer 1

Does checking "Share User Certificates" in the capabilities help at all?
Matt Small - Microsoft Escalation Engineer - Forum Moderator
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