[ArgumentNullException: Value cannot be null.
Parameter name: source]
System.Linq.Enumerable.Where(IEnumerable`1 source, Func`2 predicate) +6295698
BO.CategoryHandler..cctor() +570
[TypeInitializationException: The type initializer for 'BO.CategoryHandler' threw an exception.]
BO.CategoryHandler..ctor() +0
UI.Global.Application_Start(Object sender, EventArgs e) +86
[HttpException (0x80004005): The type initializer for 'BO.CategoryHandler' threw an exception.]
System.Web.HttpApplicationFactory.EnsureAppStartCalledForIntegratedMode(HttpContext context, HttpApplication app) +546
System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +171
System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +173
System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +255
System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +347
[HttpException (0x80004005): The type initializer for 'BO.CategoryHandler' threw an exception.]
System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +552
System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +122
System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +737
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