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I looked up in the issue and I unfortunately I have to say that our license agreement with Xceed does not allow us to redistribute the Xceed.Zip code library. The possible ways for getting this to work would be either obtaining a license from Xceed, use an open source library that has similar functionalirty, or use a similar approach as in the following Code Library thread - Batch Download Of Library Items
. You will have to first put all files you want to zip in a temporary directory and then zip them using at the end using the existing functionality of the Telerik.Zip.Manager.
the Telerik team