Global Page Error

c:\inetpub\wwwroot\DM\MvcExhausmed\Views\Shared\_ProductDetailsAnonymous.cshtml(939): error CS1061: 'MvcExhausmed.ViewModels.ProductModel' does not contain a definition for 'SterileDisplay' and no extension method 'SterileDisplay' accepting a first argument of type 'MvcExhausmed.ViewModels.ProductModel' could be found (are you missing a using directive or an assembly reference?)

Return to the Default Page c:\inetpub\wwwroot\DM\MvcExhausmed\Views\Shared\_ProductDetailsAnonymous.cshtml(939): error CS1061: 'MvcExhausmed.ViewModels.ProductModel' does not contain a definition for 'SterileDisplay' and no extension method 'SterileDisplay' accepting a first argument of type 'MvcExhausmed.ViewModels.ProductModel' could be found (are you missing a using directive or an assembly reference?)
à System.Web.Compilation.AssemblyBuilder.Compile() à System.Web.Compilation.BuildProvidersCompiler.PerformBuild() à System.Web.Compilation.BuildManager.CompileWebFile(VirtualPath virtualPath) à System.Web.Compilation.BuildManager.GetVPathBuildResultInternal(VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile, Boolean throwIfNotFound, Boolean ensureIsUpToDate) à System.Web.Compilation.BuildManager.GetVPathBuildResultWithNoAssert(HttpContext context, VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile, Boolean throwIfNotFound, Boolean ensureIsUpToDate) à System.Web.Compilation.BuildManager.GetVirtualPathObjectFactory(VirtualPath virtualPath, HttpContext context, Boolean allowCrossApp, Boolean throwIfNotFound) à System.Web.Compilation.BuildManager.GetCompiledType(VirtualPath virtualPath) à System.Web.Mvc.BuildManagerCompiledView.Render(ViewContext viewContext, TextWriter writer) à System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context) à System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) à System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) à System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult) à System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass3_0.b__1(IAsyncResult asyncResult) à System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) à System.Web.Mvc.Controller.<>c.b__152_1(IAsyncResult asyncResult, ExecuteCoreState innerState) à System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) à System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) à System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) à System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) à System.Web.Mvc.MvcHandler.<>c.b__20_1(IAsyncResult asyncResult, ProcessRequestState innerState) à System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) à System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) à System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() à System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) à System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)