[BadImageFormatException:  is not a valid Win32 application. (Exception from HRESULT: 0x800700C1)]
 System.Reflection.Assembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, Assembly locationHint,
 StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection) +0 
System.Reflection.Assembly.InternalLoad(AssemblyName assemblyRef, Evidence assemblySecurity, StackCrawlMark& stackMark, 
Boolean forIntrospection) +416 System.Reflection.Assembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& 
stackMark, Boolean forIntrospection) +166 System.Reflection.Assembly.Load(String assemblyString) +35 
System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective) +190  
 
[ConfigurationErrorsException:  is not a valid Win32 application. (Exception from HRESULT: 0x800700C1)] 
System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective) +11241896 
System.Web.Configuration.CompilationSection.LoadAllAssembliesFromAppDomainBinDirectory() +388 
System.Web.Configuration.CompilationSection.LoadAssembly(AssemblyInfo ai) +232 
System.Web.Configuration.AssemblyInfo.get_AssemblyInternal() +48 
System.Web.Compilation.BuildManager.GetReferencedAssemblies(CompilationSection compConfig) +210 
System.Web.Compilation.BuildProvidersCompiler..ctor(VirtualPath configPath, Boolean supportLocalization, String outputAssemblyName) +76 
System.Web.Compilation.ApplicationBuildProvider.GetGlobalAsaxBuildResult(Boolean isPrecompiledApp) +283 
System.Web.Compilation.BuildManager.CompileGlobalAsax() +50 System.Web.Compilation.BuildManager.EnsureTopLevelFilesCompiled() +676
 
[HttpException (0x80004005):  is not a valid Win32 application. (Exception from HRESULT: 0x800700C1)] 
System.Web.Compilation.BuildManager.ReportTopLevelCompilationException() +76 
System.Web.Compilation.BuildManager.EnsureTopLevelFilesCompiled() +1012 
System.Web.Hosting.HostingEnvironment.Initialize(ApplicationManager appManager, IApplicationHost appHost, IConfigMapPathFactory 
configMapPathFactory, HostingEnvironmentParameters hostingParameters) +1025  
 
[HttpException (0x80004005):  is not a valid Win32 application. (Exception from HRESULT: 0x800700C1)] 
System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +11335894 
System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +88 
System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +4355316