redirect to Primary - if page is requested via any other url than primaryUrl then permanent redirect to primaryUrl

gistfile1.cs

@{
    Layout = null;

    string primaryUrl = "www.jesper.com";
    string adjustedUrl = "";
    bool doRedirect = false;

    var thisUrl = HttpContext.Current.Request.Url;
    string host = thisUrl.Host.ToLower();
    string PathAndQuery = thisUrl.PathAndQuery;
    string scheme = thisUrl.Scheme;

    int port = thisUrl.Port;


    if (host != primaryUrl)
    {

        string sPort = port == 80 ? "" : ":" + port;
        adjustedUrl = scheme + "://" + primaryUrl + sPort + PathAndQuery;
        doRedirect = true;


    }


    if (doRedirect && !host.Contains("localhost"))
    {
        HttpContext.Current.Response.Status = "301 Moved Permanently";
        HttpContext.Current.Response.AddHeader("Location", adjustedUrl);


    }

}

The goal with this approach was to make it easy to feed the primaryUrl from Umbraco content ...