InvalidOperationException causing break in Visual Studio even when handled in C# code

Question

In my C# application, I am catching exceptions of type SystemException , yet Visual Studio 2015 breaks when the exception is raised:

As you can see in the screen-capture above, I am intentionally releasing an ISupportInitialize lock early, before certain objects are initialized. I am expecting the exception, and have a catch block.

Also, the exceptions I am interested in are not listed in the exception settings window; ie they are not checked to go into the break mode.

And although the dialog shows that "Break when this exception is thrown" is unchecked, and yet, the application still goes into break mode.

EDIT:

Stack trace requested by SLaks:

PresentationCore.dll!System.Windows.Media.GlyphRun.CheckInitialized() Unknown PresentationCore.dll!System.Windows.Media.GlyphRun.ComputeInkBoundingBox() Unknown PresentationCore.dll!System.Windows.Media.BoundsDrawingContextWalker.DrawGlyphRun(System.Windows.Media.Brush foregroundBrush, System.Windows.Media.GlyphRun glyphRun) Unknown PresentationCore.dll!System.Windows.Media.RenderData.DrawingContextWalk(System.Windows.Media.DrawingContextWalker ctx) Unknown PresentationCore.dll!System.Windows.Media.RenderData.GetContentBounds(System.Windows.Media.BoundsDrawingContextWalker ctx) Unknown PresentationCore.dll!System.Windows.UIElement.GetHitTestBounds() Unknown PresentationCore.dll!System.Windows.Media.Visual.PrecomputeContent() Unknown PresentationCore.dll!System.Windows.Media.Visual.PrecomputeRecursive(out System.Windows.Rect bboxSubgraph) Unknown PresentationCore.dll!System.Windows.Media.Visual.PrecomputeRecursive(out System.Windows.Rect bboxSubgraph) Unknown PresentationCore.dll!System .Windows.Media.Visual.PrecomputeRecursive(out System.Windows.Rect bboxSubgraph) Unknown PresentationCore.dll!System.Windows.Media.Visual.PrecomputeRecursive(out System.Windows.Rect bboxSubgraph) Unknown PresentationCore.dll!System.Windows.Media.Visual.PrecomputeRecursive(out System.Windows.Rect bboxSubgraph) Unknown PresentationCore.dll!System.Windows.Media.Visual.PrecomputeRecursive(out System.Windows.Rect bboxSubgraph) Unknown PresentationCore.dll!System.Windows.Media.Visual.PrecomputeRecursive(out System.Windows.Rect bboxSubgraph) Unknown PresentationCore.dll!System.Windows.Media.Visual.Precompute() Unknown PresentationCore.dll!System.Windows.Media.CompositionTarget.System.Windows.Media.ICompositionTarget.Render(bool inResize, System.Windows.Media.Composition.DUCE.Channel channel) Unknown PresentationCore.dll!System.Windows.Media.MediaContext.Render(System.Windows.Media.ICompositionTarget resizedCompositionTarget) Unknown PresentationCore.dll!System.Windows.Media.MediaContext.Render MessageHandlerCore(object resizedCompositionTarget) Unknown PresentationCore.dll!System.Windows.Media.MediaContext.RenderMessageHandler(object resizedCompositionTarget) Unknown WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate callback, object args, int numArgs) Unknown WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.TryCatchWhen(object source, System.Delegate callback, object args, int numArgs, System.Delegate catchHandler) Unknown WindowsBase.dll!System.Windows.Threading.DispatcherOperation.InvokeImpl() Unknown WindowsBase.dll!System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(object state) Unknown mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx) Unknown mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.Conte xtCallback callback, object state, bool preserveSyncCtx) Unknown mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state) Unknown WindowsBase.dll!MS.Internal.CulturePreservingExecutionContext.Run(MS.Internal.CulturePreservingExecutionContext executionContext, System.Threading.ContextCallback callback, object state) Unknown WindowsBase.dll!System.Windows.Threading.DispatcherOperation.Invoke() Unknown WindowsBase.dll!System.Windows.Threading.Dispatcher.ProcessQueue() Unknown WindowsBase.dll!System.Windows.Threading.Dispatcher.WndProcHook(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam, ref bool handled) Unknown WindowsBase.dll!MS.Win32.HwndWrapper.WndProc(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam, ref bool handled) Unknown WindowsBase.dll!MS.Win32.HwndSubclass.DispatcherCallbackOperation(object o) Unknown WindowsBase.dll!System.Windo ws.Threading.ExceptionWrapper.InternalRealCall(System.Delegate callback, object args, int numArgs) Unknown WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.TryCatchWhen(object source, System.Delegate callback, object args, int numArgs, System.Delegate catchHandler) Unknown WindowsBase.dll!System.Windows.Threading.Dispatcher.LegacyInvokeImpl(System.Windows.Threading.DispatcherPriority priority, System.TimeSpan timeout, System.Delegate method, object args, int numArgs) Unknown WindowsBase.dll!MS.Win32.HwndSubclass.SubclassWndProc(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam) Unknown [Native to Managed Transition]
[Managed to Native Transition]
WindowsBase.dll!System.Windows.Threading.Dispatcher.PushFrameImpl(System.Windows.Threading.DispatcherFrame frame) Unknown WindowsBase.dll!System.Windows.Threading.Dispatcher.PushFrame(System.Windows.Threading.DispatcherFrame frame) Unknown PresentationFramework.dll!System.Windows.Application.RunDispatcher(object ignore) Unknown PresentationFramework.dll!System.Windows.Application.RunInternal(System.Windows.Window window) Unknown PresentationFramework.dll!System.Windows.Application.Run(System.Windows.Window window) Unknown PresentationFramework.dll!System.Windows.Application.Run() Unknown FargoApp.exe!FargoApp.App.Main() Unknown [Native to Managed Transition]
[Managed to Native Transition]
mscorlib.dll!System.AppDomain.ExecuteAssembly(string assemblyFile, System.Security.Policy.Evidence assemblySecurity, string[] args) Unknown Microsoft.VisualStudio.HostingProcess.Utilities.dll!Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly() Unknown mscorlib.dll!System.Threading.ThreadHelper.ThreadStart_Context(object state) Unknown mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx) Unknown mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx) Unknown mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state) Unknown mscorlib.dll!System.Threading.ThreadHelper.ThreadStart() Unknown

Answer 1

You can not catch the exception probably because it occurs in another thread. For such scenarios you can add an event handler to DispatcherUnhandledExceptiont event in your App.xaml.cs, like this:

DispatcherUnhandledException += (sender, args) =>
            {
                Console.WriteLine("Wild exception appeared!!!");
            };

This way you can be sure that exceptions thrown by your applications but not handled will trigger this handler. Mor info here

Hope this helps!