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Resolving the error when running the ASP.NET sample browser.

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 Resolving the “Could not load type 'System.ServiceModel.Activation.HttpModule'“error

Error message


This issue may arise if you have installed Syncfusion Essential Studio with all the product components including Silverlight in the IIS-configured machine. This is a known issue, and it will be fixed starting from version 11.x.x.xx of Syncfusion Essential Studio.

As a workaround, you can resolve it by running Aspnet_regiis.exe with the below arguments to re-register the correct version of ASP.NET in the IIS web server.

      1) Open the command prompt with administrative privileges and navigate to the the Aspnet_regiis.exe file, which can be found in one of the following locations:

  • %windir%\Microsoft.NET\Framework\v4.0.30319
  • %windir%\Microsoft.NET\Framework64\v4.0.30319 (on a 64-bit computer)

2)      Run Aspnet_regiis.exe with the following arguments: aspnet_regiis.exe /iru

3)      Refresh the IIS web server or run the iisreset command in admin mode and restart the Syncfusion dashboard.

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