Answer by Ryan for ASP.NET Core can't see images when acceding by browser

If you would like to access your file from your own folder img located in the root of the project instead of the default wwwroot folder ,you need to configure the Static File Middleware in startup.cs Configure method like below:

app.UseStaticFiles();// For the wwwroot folderapp.UseStaticFiles(new StaticFileOptions    {        FileProvider = new PhysicalFileProvider(            Path.Combine(Directory.GetCurrentDirectory(), "img")),        RequestPath = "/img"    });app.UseRouting();//other middlewares

Refer to https://learn.microsoft.com/en-us/aspnet/core/fundamentals/static-files?view=aspnetcore-2.2#serve-files-outside-of-web-root