There is no necessity for the Clear call. Here are the details you requested:
Since version 2008.2.723 RadUpload
only "reads" the upload information, leaving the file handling to the ASP.NET itself. The uploaded files are handled by the HttpWorkerRequest
and are saved in a temporary location (in contrast, ASP.NET 1.x stored the files in the memory).
call simply clears the collection, but does not clear the files, which are saved in the temporary location.
The temporary files get cleared by the ASP.NET during the End_Request
phase (or on application shutdown).
I hope this helps.
the Telerik team
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