mscorlib.ni.dll中出现“Microsoft.Live.LiveAuthException”类型的第一次机会异常

Question

我正在尝试使用WP8上的Live SDK登录。我能够登录几天但现在没有对代码进行任何更改我得到了第一次机会异常。

使用的代码：

 try
        {
            auth = new LiveAuthClient("0000000044107D80");
            LiveLoginResult result = await auth.InitializeAsync(new string[] { "wl.basic", "wl.signin", "wl.emails" });
            if (result.Status != LiveConnectSessionStatus.Connected)
            {
                result = await auth.LoginAsync(new string[] { "wl.basic", "wl.signin", "wl.emails" });
            }
            if (result.Status == LiveConnectSessionStatus.Connected)
            {
                var connect = new LiveConnectClient(auth.Session);
                var opResult = await connect.GetAsync("me");
                dynamic nameResult = opResult.Result;
                MessageBox.Show(string.Format("Welcome, {0}", nameResult.first_name));
            }
            }
        catch (Exception ex)
        {
            System.Diagnostics.Debug.WriteLine(ex.StackTrace);
        }

堆栈跟踪：

A first chance exception of type 'Microsoft.Live.LiveAuthException' occurred in mscorlib.ni.dll
A first chance exception of type 'Microsoft.Live.LiveAuthException' occurred in mscorlib.ni.dll
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
at Microsoft.Live.LiveAuthClient.<LoginAsync>d__c.MoveNext()
--- End of stack trace from previous location where exception was thrown --- at       
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
at PhoneApp2.MainPage.<Login>d__4.MoveNext()

如果没有使用try / catch包围登录部分，我可以在调试控制台上看到它：

A first chance exception of type 'System.Reflection.TargetInvocationException' occurred    in mscorlib.ni.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.Windows.ni.dll

可能导致此类行为的原因是什么？