Return a zip file on the fly from a ASP.NET WebApi ApiController

gistfile1.cs

using Ionic.Zip; // from NUGET-Package "DotNetZip"


public HttpResponseMessage AllZipped()
{
    using (var zipFile = new ZipFile())
    {
        // zipFile.AddEntry(...);
        // zipFile.AddEntry(...);

        return ZipContentResult(zipFile);
    }
}

protected HttpResponseMessage ZipContentResult(ZipFile zipFile)
{
    // inspired from http://stackoverflow.com/a/16171977/92756
    var pushStreamContent = new PushStreamContent((stream, content, context) =>
    {
      zipFile.Save(stream);
      stream.Close(); // After save we close the stream to signal that we are done writing.
    }, "application/zip");

    return new HttpResponseMessage(HttpStatusCode.OK) {Content = pushStreamContent};
}

How can we rename file name lets say testZip.zip