ASPNetCore Change response via Middleware

Startup.cs

namespace Project
{
    public class Startup
    {
        public Startup(IHostingEnvironment env)
        {
            //...
        }
        
        public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
        {
            //...
            
            app.Use(async (context, next) =>
            {
                 await RewriteResponse(context, next);
            });

            //This needs to be after Middleware
            app.UseMvc(routes =>
            {
                routes.MapSpaFallbackRoute("spa-fallback", new { controller = "home", action = "index" });
            });
        }
        
        public async Task RewriteResponse(HttpContext context, Func<Task> next)
        {
            using (var responseBodyStream = new MemoryStream())
            {
                var bodyStream = context.Response.Body;

                try
                {
                    context.Response.Body = responseBodyStream;

                    await next();

                    responseBodyStream.Seek(0, SeekOrigin.Begin);
                    var responseBody = new StreamReader(responseBodyStream).ReadToEnd();

                    //Modify the response in some way (Example)
                    responseBody = responseBody.Replace(@"\n", @"<br/>");

                    using (var newStream = new MemoryStream())
                    {
                        var sw = new StreamWriter(newStream);
                        sw.Write(responseBody);
                        sw.Flush();

                        newStream.Seek(0, SeekOrigin.Begin);

                        await newStream.CopyToAsync(bodyStream);
                    }
                }
                finally
                {
                    context.Response.Body = bodyStream;
                }
            }
        }
    }
}