In ASP.NET Core MVC, uploading multiple files refers to the process of sending more than one file from a client to a server in a single HTTP request,
typically handled via the IFormFile interface and model binding.
1. Configure the View (HTML)
To allow multiple file selection, your HTML form must meet two specific requirements:
Encoding Type: The 'form' tag must include enctype="multipart/form-data".
Multiple Attribute: The 'input' element must have the multiple attribute, which enables users to select more than one file from their file picker.