XPS rendering extension requires Telerik.Reporting.XpsRendering assembly (Telerik.Reporting.XpsRendering.dll)
The assembly must be referenced in the project where the report is exported. If you are using a Reporting service, the reference must be added in the service's project. On deploying the application, verify the DLL is copied in the Bin folder. For the purpose select the reference in Visual Studio and set its CopyLocal=true.
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