SWMNU.Net.FlashMessage (nuget): A Razor Class Library that provides a means to display Flash Messages in an ASP.NET web application. (Razor Pages and MVC are supported.)       It depends on and utilizes Twitter Bootstrap 5 for the alert CSS and HTML.
Keywords: flash|message|alert|bootstrap|asp.net|core|webapp|asp-net-core|bootstrap4|bootstrap5|csharp-library