Thank you for your interest in GroupDocs.Viewer. Yes, you are absolutely right, GroupDocs.Viewer “materializes” document from the stream into the temp file, this is described in the article “How to Use GroupDocs.Viewer with Streams in ASP.NET MVC or WebForms Projects”. This is done in order to perform caching and to prevent the situations, when stream is not available (disposed, changed etc.) but is still required by the GroupDocs.Viewer.
If you are confident that temporary files are not useful and want to clear the cache, you can use the “DocumentCache.RemoveOldEntries” instance method, which is described in the article “Description of GroupDocs Viewer DocumentCache class”.
If you will have more questions please feel free to contact us.
It will not deleted temporary files practically . Plz suggest me if any options available