Causes of System.IO.FileLoadException in OnStartup of WPF Application

Question

I am debugging a WPF application that crashes with a unhandled System.IO.FileLoadException when started.

I used the Assembly Binding Log Viewer to verify that there are no assembly loading errors and all the code in the OnStartup override is wrapped in a try catch.

Having ruled out Assembly binding as the cause of the Exception, what are other possible causes I should be looking into?

Below are the relevant event log entries:

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The first error with source "ApplicationError"

Faulting application name: CompanyProductManager.exe, version: 4.2.0.0, time stamp: 0x514a20ba
Faulting module name: KERNELBASE.dll, version: 6.1.7601.18015, time stamp: 0x50b8479b
Exception code: 0xe0434352
Fault offset: 0x0000000000009e5d
Faulting process id: 0xf18
Faulting application start time: 0x01ce3c6ce70ee3f8
Faulting application path: C:\Users\My_User\AppData\Local\Apps\2.0\VJ12169A.3AG\6445EVK6.26Y\wmsd..tion_9fb3931a66281a0b_0004.0000_68586becb8f48f17\CompanyProductManager.exe
Faulting module path: C:\Windows\system32\KERNELBASE.dll
Report Id: 2588c97b-a860-11e2-be7c-3cd92b4a0af4

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The second error with source ".NET Runtime"

Application: CompanyProductManager.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.IO.FileLoadException
Stack:
   at CompanySI.CompanyProduct.CompanyProductManager.App.OnStartup(System.Windows.StartupEventArgs)
   at System.Windows.Application.<.ctor>b__1(System.Object)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate, System.Object, Int32)
   at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(System.Object, System.Delegate, System.Object, Int32, System.Delegate)
   at System.Windows.Threading.DispatcherOperation.InvokeImpl()
   at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
   at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
   at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
   at System.Windows.Threading.DispatcherOperation.Invoke()
   at System.Windows.Threading.Dispatcher.ProcessQueue()
   at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr, Int32, IntPtr, IntPtr, Boolean ByRef)
   at MS.Win32.HwndWrapper.WndProc(IntPtr, Int32, IntPtr, IntPtr, Boolean ByRef)
   at MS.Win32.HwndSubclass.DispatcherCallbackOperation(System.Object)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate, System.Object, Int32)
   at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(System.Object, System.Delegate, System.Object, Int32, System.Delegate)
   at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(System.Windows.Threading.DispatcherPriority, System.TimeSpan, System.Delegate, System.Object, Int32)
   at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr, Int32, IntPtr, IntPtr)
   at MS.Win32.UnsafeNativeMethods.DispatchMessage(System.Windows.Interop.MSG ByRef)
   at MS.Win32.UnsafeNativeMethods.DispatchMessage(System.Windows.Interop.MSG ByRef)
   at System.Windows.Threading.Dispatcher.PushFrameImpl(System.Windows.Threading.DispatcherFrame)
   at System.Windows.Application.RunInternal(System.Windows.Window)
   at System.Windows.Application.Run()
   at CompanySI.CompanyProduct.CompanyProductManager.App.Main()

Halt

I had a similar error like your first "ApplicationError". silent tone´s answer below helped me to fix my problem. So I had to enable verification skipping because my assemblies were only signed with public key and get delay signed later. – Stenophagous

Looks similar to this.. #7451134 – Sanmiguel

and this... community.sharpdevelop.net/forums/t/21717.aspx ..got a corrupt hard disk or ssd? – Sanmiguel

or this .... blogs.msdn.com/b/shawnfa/archive/2009/06/08/… – Sanmiguel

Are you running the application from a folder that needs to be unblocked? #11464551 Are you running the application from a network folder? – Sanmiguel

Try adding a catch for that specific exception...so you can capture the "FileName".......so you have a better idea. " catch(System.IO.FileNotFoundException fnfex) { string x = fnfex.FileName; /*Log it somewhere */ } – Semanteme

Answer 1

Loading a delay signed assembly on a machine where verification skipping has not been enabled can cause a similar error.

Introit

Answer 2

Just a guess, but I've seen a corrupt user.config file do something like this before with another application. That was a while back and I don't remember exactly what the exception was that was thrown. Check if you have one in the AppData directory (or elsewhere) and remove it.

Rainstorm

Thanks, but this did not fix the issue. – Halt