The limitation of 100 files to be uploaded with one selection can`t be changed. The dialog which is created to upload the files is not exposed as a mappable type which can be changed. I have tried a different approach to map the template of the dialog, but the access to the MaxFileCount property of the FileUploader is protected and can`t be changed. Excuse us for the inconvenience caused by this limitation.
All the best,
the Telerik team
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