Sử dụng URL Rewriting Middleware in ASP.NET Core

using Microsoft.AspNetCore.Rewrite;

var options = new RewriteOptions().AddRedirect("(.*[^/])$", "$1/");
            app.UseRewriter(options);

https://docs.microsoft.com/en-us/aspnet/core/fundamentals/url-rewriting?view=aspnetcore-3.1