Update error-registering-the-viewer-with-the-service.md (#1463)

* Update error-registering-the-viewer-with-the-service.md

* Update error-registering-the-viewer-with-the-service.md

* Update error-registering-the-viewer-with-the-service.md

knowledge-base/error-registering-the-viewer-with-the-service.md

@@ -1,16 +1,16 @@
 ---
 title: Error registering the viewer with the service. Access to the path X is denied.
-description: After deploying there is an error Access to the path 'C:\Windows\TEMP\<NAME>\<VERSION>\LCT\value.dat' is denied.
+description: Learn why after deploying on IIS there is an error 'Access to the path C:\Windows\TEMP\<NAME>\<VERSION>\LCT\value.dat is denied' and how to fix it.
 type: troubleshooting
-page_title: Error registering the viewer with the service. Access to the path X is denied.
+page_title: Fixing the problem Error registering the viewer with the service. Access to the path X is denied.
 slug: error-registering-the-viewer-with-the-service
-position: 
-tags: 
+tags: rest,service,configuration
 ticketid: 1165109
 res_type: kb
 ---
 
 ## Environment
+
 <table>
 	<tr>
 		<td>Product</td>
@@ -22,7 +22,6 @@ res_type: kb
 	</tr>
 </table>
 
-
 ## Error Message
 
 ````
@@ -34,10 +33,16 @@ Access to the path 'C:\Windows\TEMP\\**NAME**\\**VERSION**\LCT\value.dat' is den
 Where **NAME** is the name of the application and **VERSION** is the currently installed on the machine version of the product
 
 ## Cause\Possible Cause(s)
-The error message "Access to the path X is denied" indicates that the [Telerik Reporting REST service]({% slug telerikreporting/using-reports-in-applications/host-the-report-engine-remotely/telerik-reporting-rest-services/overview %}) cannot access the configured file storage. By default, user temp folder will be used as a storage which is *'C:\Windows\TEMP'* in this case. 
+
+The error message "Access to the path X is denied" indicates that the [Telerik Reporting REST service]({% slug telerikreporting/using-reports-in-applications/host-the-report-engine-remotely/telerik-reporting-rest-services/overview %}) cannot access the configured file storage. By default, the user temp folder will be used as a storage which is *'C:\Windows\TEMP'* in this case. 
 
 ## Solution
-Test changing the default folder using the [second overload of the FileStorage](/reporting/api/Telerik.Reporting.Cache.File.FileStorage#collapsible-Telerik_Reporting_Cache_File_FileStorage__ctor_System_String_) and passing the custom folder location. The changes need to be made in ReportsController.cs file where the settings of the Reporting REST service are defined.
+
+Test changing the default folder using the [second overload of the FileStorage](/reporting/api/Telerik.Reporting.Cache.File.FileStorage#collapsible-Telerik_Reporting_Cache_File_FileStorage__ctor_System_String_) and passing the custom folder location.
+
+### ASP.NET projects
+
+The changes need to be made in the `ReportsController.cs` file where the settings of the Reporting REST service are defined.
 
 Example of ReporsController which connects the REST Service and HTML5 Report Viewer:
 
@@ -70,7 +75,29 @@ public class ReportsController : ReportsControllerBase
 }
 ````
 
+### ASP.NET Core projects
+
+The changes need to be made at the starting point of the web application where the [ReportServiceConfiguration](/api/telerik.reporting.services.reportserviceconfiguration) is registered as a service. For the projects with top-level statements, this is the `Program.cs` file. For the other projects, by default, this is the `Startup.cs` file.
+
+Here is a sample code for the ReportServiceConfiguration:
+ 
+````CSharp
+// Configure dependencies for ReportsController.
+builder.Services.TryAddSingleton<IReportServiceConfiguration>(sp =>
+    new ReportServiceConfiguration
+    {
+        // The default ReportingEngineConfiguration will be initialized from appsettings.json or appsettings.{EnvironmentName}.json:
+        ReportingEngineConfiguration = sp.GetService<IConfiguration>(),
+        // In case the ReportingEngineConfiguration needs to be loaded from a specific configuration file, use the approach below:
+        //ReportingEngineConfiguration = ResolveSpecificReportingConfiguration(sp.GetService<IWebHostEnvironment>()),
+        HostAppId = "Html5App",
+        Storage = new FileStorage("C:\MyFolder"),
+        ReportSourceResolver = new UriReportSourceResolver(System.IO.Path.Combine(sp.GetService<IWebHostEnvironment>().ContentRootPath, "Reports"))
+    });
+````
+
+
 Make sure that the IIS process has read/write access for the folder used by the storage. To give access to the folder go to Properties - Sharing|Security options or change the used application pool's Identity through IIS Manager.
 
-In case of different instances of the application running, set a unique **HostAppId** for each instance of the Reporting REST Service. Another approach is using MsSqlStorage or Redis, which are suitable for multiple instance environment. The settings must be added in the ReportsController.cs.
+In case of different instances of the application running, set a unique **HostAppId** for each instance of the Reporting REST Service. Another approach is using MsSqlStorage or Redis, which are suitable for multiple instance environments. The settings must be added in the ReportsController.cs.
 The appropriate cache storage options should be considered depending on the hosting environment. Please check the available options in [REST Service Storage]({%slug telerikreporting/using-reports-in-applications/host-the-report-engine-remotely/telerik-reporting-rest-services/rest-service-storage/overview%}).