Hi Fabien,

The "ReadTimeout" property isn't currently used by the FileSelect component and it is present as the "Stream" parameter inherits from the System.iO.Stream class, so that it matches its structure for convenience.

However, we do not intend to support "all" functionalities of the "Stream" class (in fact, most of them are intentionally not implemented to make the distinction more verbose, you can check this in the source code of Telerik UI for Blazor in the "FileInfoStream.cs" file).

For more details what is supported and how do we recommend the FileSelect component to be used, please refer to the documentation:

https://www.telerik.com/blazor-ui/documentation/components/fileselect/overview 

This being said, what I can suggest is for you to convert the underlying stream data to a new stream and use it for further processing, which will allow you to use the "ReadTimeout" property.

Regards,
Stamo Gochev
Progress Telerik