RadUpload provided an option to check .InvalidFiles.Count.  I assumed this worked in conjunction with the valid extensions.    Or does it not apply any longer since the "File Selection" dialog automatically includes only those with a valid extension.

When I click submit to post back the page, the .UploadedFiles.Count is 0.  

We use the "Upload" as a generic control throughout our application.   When an upload is complete, we pass data back to a calling such as file name, actual name, path, and content type.  

Hello Peter,

The InvalidFiles collection is working in conjunction with the valid extension and size. The file dialog is not possible to be filtered with the RadUpload control. Only when RadAsyncUpload control is used with Silverlight/Flash module the dialog is possible to be filtered. Could you please elaborate in what setup the UploadedFiles collection is empty?

Regards,
Peter Filipov
the Telerik team