DotNetNuke File Type Error

DotNetNuke (DNN) is a good content management system that greatly simplifies the day to day administration and content management of sites. One nice feature is the file management system which allows users to upload files from their local computers to the filesystem on the DNN Web server portal root. They can then use the DNN GUI to add widgets such as the Documents module that provides a fast and simple way to give site visitors access to these files.

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