ASP.NET Response.Redirect uses 302 instead of 301

Question

using the following code

context.Response.StatusCode = 301;

context.Response.Redirect(newUrl, true);
context.Response.End();

I can see in

Answer 1

I am combining the answers above with something I use if I have old domains/sub-domains for different versions of a site that I want to redirect to the current, mostly for SEO reasons, so as to not have multiple versions of the same site at different URLs:

using System;
using System.Net;
using System.Web;
using System.Web.Http;
using System.Web.Mvc;
using System.Web.Optimization;
using System.Web.Routing;

namespace myapp.web {
  public class Global : HttpApplication {
    void Application_Start(object sender, EventArgs e) {
      // Code that runs on application startup
      AreaRegistration.RegisterAllAreas();
      GlobalConfiguration.Configure(WebApiConfig.Register);
      FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
      RouteConfig.RegisterRoutes(RouteTable.Routes);
      BundleConfig.RegisterBundles(BundleTable.Bundles);
    }

    protected void Application_BeginRequest(object sender, EventArgs e) {
      //some of these checks may be overkill
      if ((HttpContext.Current != null)
        && (HttpContext.Current.Request != null)
        && (HttpContext.Current.Request.ServerVariables != null)
        && (!String.IsNullOrEmpty(HttpContext.Current.Request.ServerVariables["HTTP_HOST"]))
        ) {
        switch (HttpContext.Current.Request.ServerVariables["HTTP_HOST"]) {
          case "old.url.com":
            HttpContext.Current.Response.RedirectPermanent("https://new.url.com", true);
            //status code is not needed if redirect perm is used
            HttpContext.Current.Response.StatusCode = (int)HttpStatusCode.MovedPermanently;
            HttpContext.Current.Response.End();
            break;
          case "nightly.old.url.com":
            HttpContext.Current.Response.RedirectPermanent("https://nightly.new.url.com", true);
            //status code is not needed if redirect perm is used
            HttpContext.Current.Response.StatusCode = (int)HttpStatusCode.MovedPermanently;
            HttpContext.Current.Response.End();
            break;
        }
      }
    }
  }
}