Method not found: 'System.String System.ServiceModel.Activation.Iis7Helper.ExtendedProtectionDotlessSpnNotEnabledThrowHelper(System.Object)'.

After installing Microsoft patch MS13-04[KB 2756920](Security Update for Microsoft .NET Framework 3.5.1 on Windows 7 and Windows Server 2008 R2 - A security issue has been identified that could allow an unauthenticated remote attacker to compromise your system and gain control over it.), our SharePoint Portal was down with the error :
 WebHost failed to process a request. 
 Sender Information: System.ServiceModel.ServiceHostingEnvironment+HostingManager/17653682 Exception: System.ServiceModel.ServiceActivationException: The service '/SecurityTokenServiceApplication/securitytoken.svc' cannot be activated due to an exception during compilation. The exception message is: Method not found: 'System.String System.ServiceModel.Activation.Iis7Helper.ExtendedProtectionDotlessSpnNotEnabledThrowHelper(System.Object)'.. ---> System.MissingMethodException: Method not found: 'System.String System.ServiceModel.Activation.Iis7Helper.ExtendedProtectionDotlessSpnNotEnabledThrowHelper(System.Object)'. at System.ServiceModel.WasHosting.MetabaseSettingsIis7V2.WebConfigurationManagerWrapper.BuildExtendedProtectionPolicy(ExtendedProtectionTokenChecking tokenChecking, ExtendedProtectionFlags flags, List`1 spnList) at System.ServiceModel.WasHosting.MetabaseSettingsIis7V2.WebConfigurationManagerWrapper.GetExtendedProtectionPolicy(ConfigurationElement element) at System.ServiceModel.WasHosting.MetabaseSettingsIis7V2.ProcessWindowsAuthentication(String siteName, String virtualPath, HostedServiceTransportSettings& transportSettings) at System.ServiceModel.WasHosting.MetabaseSettingsIis7V2.CreateTransportSettings(String relativeVirtualPath) at System.ServiceModel.Activation.MetabaseSettingsIis.GetTransportSettings(String virtualPath) at System.ServiceModel.Activation.MetabaseSettingsIis.GetAuthenticationSchemes(String virtualPath) at System.ServiceModel.Channels.HttpChannelListener.ApplyHostedContext(VirtualPathExtension virtualPathExtension, Boolean isMetadataListener) at System.ServiceModel.Channels.HttpTransportBindingElement.BuildChannelListener[TChannel](BindingContext context) at System.ServiceModel.Channels.BindingContext.BuildInnerChannelListener[TChannel]() at System.ServiceModel.Channels.MessageEncodingBindingElement.InternalBuildChannelListener[TChannel](BindingContext context) at System.ServiceModel.Channels.BinaryMessageEncodingBindingElement.BuildChannelListener[TChannel](BindingContext context) at System.ServiceModel.Channels.BindingContext.BuildInnerChannelListener[TChannel]() at System.ServiceModel.Channels.Binding.BuildChannelListener[TChannel](Uri listenUriBaseAddress, String listenUriRelativeAddress, ListenUriMode listenUriMode, BindingParameterCollection parameters) at System.ServiceModel.Description.DispatcherBuilder.MaybeCreateListener(Boolean actuallyCreate, Type[] supportedChannels, Binding binding, BindingParameterCollection parameters, Uri listenUriBaseAddress, String listenUriRelativeAddress, ListenUriMode listenUriMode, ServiceThrottle throttle, IChannelListener& result, Boolean supportContextSession) at System.ServiceModel.Description.DispatcherBuilder.BuildChannelListener(StuffPerListenUriInfo stuff, ServiceHostBase serviceHost, Uri listenUri, ListenUriMode listenUriMode, Boolean supportContextSession, IChannelListener& result) at System.ServiceModel.Description.DispatcherBuilder.InitializeServiceHost(ServiceDescription description, ServiceHostBase serviceHost) at System.ServiceModel.ServiceHostBase.InitializeRuntime() at Microsoft.IdentityModel.Protocols.WSTrust.WSTrustServiceHost.InitializeRuntime() at System.ServiceModel.ServiceHostBase.OnOpen(TimeSpan timeout) at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout) at System.ServiceModel.ServiceHostingEnvironment.HostingManager.ActivateService(String normalizedVirtualPath) at System.ServiceModel.ServiceHostingEnvironment.HostingManager.EnsureServiceAvailable(String normalizedVirtualPath) --- End of inner exception stack trace --- at System.ServiceModel.ServiceHostingEnvironment.HostingManager.EnsureServiceAvailable(String normalizedVirtualPath) at System.ServiceModel.ServiceHostingEnvironment.EnsureServiceAvailableFast(String relativeVirtualPath) Process Name: w3wp 

 RESOLUTION: Uninstall KB 2756920