C# NFC在Windows Phone 8中不工作

我有一台诺基亚Lumia 820设备。当我对其运行NFC测试应用程序时，输出窗口显示exited，代码为259 0x103

完整调试输出为

'TaskHost.exe' (CLR C:\windows\system32\coreclr.dll: DefaultDomain): Loaded 'C:\windows\system32\mscorlib.ni.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'TaskHost.exe' (CLR C:\windows\system32\coreclr.dll: Silverlight AppDomain): Loaded 'C:\windows\system32\System.Windows.RuntimeHost.ni.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'TaskHost.exe' (CLR C:\windows\system32\coreclr.dll: Silverlight AppDomain): Loaded 'C:\windows\system32\System.Windows.ni.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'TaskHost.exe' (CLR C:\windows\system32\coreclr.dll: Silverlight AppDomain): Loaded 'C:\windows\system32\System.Net.ni.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'TaskHost.exe' (CLR C:\windows\system32\coreclr.dll: Silverlight AppDomain): Loaded 'C:\windows\system32\System.ni.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'TaskHost.exe' (CLR C:\windows\system32\coreclr.dll: Silverlight AppDomain): Loaded 'C:\windows\system32\System.Xml.ni.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'TaskHost.exe' (CLR C:\windows\system32\coreclr.dll: Silverlight AppDomain): Loaded 'C:\Data\Programs\{D86D77EF-53AA-4B7D-95C4-450B169C3814}\Install\Test NFC.DLL'. Symbols loaded.
'TaskHost.exe' (CLR C:\windows\system32\coreclr.dll: Silverlight AppDomain): Loaded 'C:\windows\system32\Microsoft.Phone.ni.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'TaskHost.exe' (CLR C:\windows\system32\coreclr.dll: Silverlight AppDomain): Loaded 'C:\windows\system32\Microsoft.Phone.Interop.ni.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'TaskHost.exe' (CLR C:\windows\system32\coreclr.dll: Silverlight AppDomain): Loaded 'C:\windows\system32\System.Core.ni.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
The thread 0x7b8 has exited with code 259 (0x103).
The thread 0x80c has exited with code 259 (0x103).

我的应用程序代码是

var proximityDevice = Windows.Networking.Proximity.ProximityDevice.GetDefault();
            if (proximityDevice != null)
            {
                MessageBox.Show("YES"); 
            }// at least one proximity device installed } 
            else
            {
                MessageBox.Show("NOOOOO");
            }

我使用琥珀色更新和GDR3预览。再看看这个屏幕。

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看看@Sorceri我看了一下，但我需要一个非常具体的答案。我需要知道为什么调试器选项“Just My Code”处于启用状态线程…已退出，代码消息正常；你有什么特别的问题吗？@PeterRitchie我已经将上面的代码编程为一个按钮点击，它没有显示任何消息框。我已经安装了诺基亚的NFC writer应用程序，当我打开该应用程序时，它会通知我在手机未处于飞机模式时关闭飞机模式。如果手机未显示任何消息框，则该应用程序不会执行。有一个简单的if，它显示了两个消息框中的一个，如果代码被执行。