在 windows phone 8 中，如果有一个 xaml 文件在后面的代码中引用了 OnFooClick 事件处理程序，如果它碰巧在同一类上存在另一个具有不同签名的 OnFooClick 方法，则应用程序在启动时会出现以下异常：
MS.Internal.WrappedException: Error HRESULT E_FAIL has been returned from a call to a COM component. ---> System.Exception: Error HRESULT E_FAIL has been returned from a call to a COM component.
at MS.Internal.XcpImports.CheckHResult(UInt32 hr)
at MS.Internal.XcpImports.UIElement_Measure_WithDesiredSize(UIElement element, Size availableSize)
at System.Windows.UIElement.Measure_WithDesiredSize(Size availableSize)
at System.Windows.Controls.VirtualizingStackPanel.MeasureChild(UIElement child, Size layoutSlotSize)
at System.Windows.Controls.VirtualizingStackPanel.MeasureOverride(Size constraint)
at System.Windows.FrameworkElement.MeasureOverride(IntPtr nativeTarget, Double inWidth, Double inHeight, Double& outWidth, Double& outHeight)
--- End of inner exception stack trace ---
这是一个错误，还是我做错了什么？