Upload multiple files in ASP.Net Core MVC. When you are trying to upload a single file, your action method can include an IFormFile reference as a parameter.

In the “Create New ASP.NET Core Web Application” window, select .NET Core as the runtime and ASP.NET Core 3.0 (or later) from the drop-down list at the top. I’ll be using ASP.NET Core 3.1 here.