private string BuildRandomImageLinkFor(string imageHandle)
{
DirectoryInfo di = new DirectoryInfo(Path.Join(Constants.WorkingDirectory, imagesDirectory, imageHandle));
FileInfo[] files = di.GetFiles();
Random rand = new Random();
int chosen = rand.Next(0, files.Length - 1);
return($"http://{Constants.BaseAddress}/{imagesDirectory}/{imageHandle}/{files[chosen].Name}" + ParameterUtils.GenerateUniqueParam());
}