When xlsx/docx document is imported, and its main story is with non-default name ('workbook. xml'/'document.xml'), e.g. workbook2.xml/document2.xml, NullReferenceException is thrown and the document is not imported. Note: Such documents are usually produced after conversion from a template dotx/xlsm.
The NuGet packages don't differ .Net Core projects from .Net Core with Desktop Compatibility Pack. This leads to incorrect resolving of the dependencies and the .Net Core projects targeting .Net Core 3.0 cannot be built.
Workaround: An option applicable for all the libraries is to extract the assemblies from the .nupkg files. For PdfProcessing and ZipLibrary you can use the assemblies directly from the pdfviewer installation folder.
Currently EULA requires Telerik assemblies to be protected against unauthorized redistribution, by following specific guidelines for the different types of technology: - for WPF: https://docs.telerik.com/devtools/wpf/installation-and-deployment/deploying-telerik-ui/protecting-telerik-assembly - for ASP.NET AJAX: https://docs.telerik.com/devtools/aspnet-ajax/deployment/protecting-the-telerik-asp.net-ajax-assembly - for WinForms: https://docs.telerik.com/devtools/winforms/installation-deployment-and-distribution/redistributing-telerik-ui-for-winforms When the guidelines for WinForms or AJAX are followed (namely the call to ValidatePassPhrase() is uncommented in AssemblyProtection.IsValid() method, the following license message is added to the generated documents: "This document was generated by a copy of Telerik Document Processing licensed for use only by '<MyApp>'." Workaround: Set the application name as resource in the Application.Current, using the following code: where 'MyApp' should be replaced with the actual application name. References to PresentationFramework and WindowsBase .NET Framework assemblies should be added in order for this approach to work.