NativeErrorCode=1400 System.ComponentModel.Win32Exception was unhandled Message=Invalid window handle Source=WindowsBase ErrorCode=-2147467259 NativeErrorCode=1400 StackTrace: at MS.Win32.HwndWrapper.DestroyWindow(Object args) at MS.Win32.HwndWrapper.Dispose(Boolean disposing, Boolean isHwndBeingDestroyed) at MS.Win32.HwndWrapper.Dispose() at System.Windows.Interop.HwndSource.Dispose(Boolean disposing) at System.Windows.Interop.HwndSource.WeakEventDispatcherShutdown.OnShutdownFinished(Object sender, EventArgs e) at System.EventHandler.Invoke(Object sender, EventArgs e) at System.Windows.Threading.Dispatcher.ShutdownImplInSecurityContext(Object state) at System.Threading.ExecutionContext.runTryCode(Object userData) at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData) at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Windows.Threading.Dispatcher.ShutdownImpl() at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame) at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame) at System.Windows.Application.RunDispatcher(Object ignore) at System.Windows.Application.RunInternal(Window window) at System.Windows.Application.Run(Window window) at Microsoft.Expression.Web.Application.MainHelper(SplashScreen splashScreen) at Microsoft.Expression.Web.Application.Main() InnerException: