VS UI PM XAML Events should catch unhandled exceptions & not crash VS

[donnie-msft]

Evaluate PMUI control events that aren't handling exceptions and causing VS to crash.

One example:
Note I have been working with InfiniteScrollList for dev and using my Experimental VS.
Here's the VS Crash:

System.ArgumentOutOfRangeException
HResult=0x80131502
Message=Specified index is out of range or child at index is null. Do not call this method if VisualChildrenCount returns zero, indicating that the Visual has no children.
Parameter name: index
Actual value was 0.
Source=PresentationFramework
StackTrace:
at System.Windows.FrameworkElement.GetVisualChild(Int32 index)
at System.Windows.Media.Visual.InternalGet2DOr3DVisualChild(Int32 index)
at System.Windows.Media.VisualTreeHelper.GetChild(DependencyObject reference, Int32 childIndex)
at NuGet.PackageManagement.UI.InfiniteScrollList.List_Loaded(Object sender, RoutedEventArgs e) in C:\NuGet.Client\src\NuGet.Clients\NuGet.PackageManagement.UI\Xamls\InfiniteScrollList.xaml.cs:line 694
at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
at System.Windows.UIElement.RaiseEvent(RoutedEventArgs e)
at System.Windows.BroadcastEventHelper.BroadcastEvent(DependencyObject root, RoutedEvent routedEvent)
at System.Windows.BroadcastEventHelper.BroadcastLoadedEvent(Object root)
at MS.Internal.LoadedOrUnloadedOperation.DoWork()
at System.Windows.Media.MediaContext.FireLoadedPendingCallbacks()
at System.Windows.Media.MediaContext.FireInvokeOnRenderCallbacks()
at System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget)
at System.Windows.Media.MediaContext.RenderMessageHandler(Object resizedCompositionTarget)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
at System.Windows.Threading.DispatcherOperation.InvokeImpl()
at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(Object state)
at MS.Internal.CulturePreservingExecutionContext.CallbackWrapper(Object obj)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at MS.Internal.CulturePreservingExecutionContext.Run(CulturePreservingExecutionContext executionContext, ContextCallback callback, Object state)
at System.Windows.Threading.DispatcherOperation.Invoke()
at System.Windows.Threading.Dispatcher.ProcessQueue()
at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)

This exception was originally thrown at this call stack:
[External Code]
NuGet.PackageManagement.UI.InfiniteScrollList.List_Loaded(object, System.Windows.RoutedEventArgs) in InfiniteScrollList.xaml.cs
[External Code]

[nkolev92]

@donnie-msft

Can we maybe narrow the scope here to specific areas?
In particular maybe this issue can track the stack you posted.

[donnie-msft]

@nkolev92 Of course. When the work is picked up, it can be broken into subtasks. Making this an epic should solve the concern.