public ActionResult Index(int skip = 0, int top = 100)
{
if (skip < 0) skip = 0;
if (top < 0) top = 0;
if (top > 100) top = 100;
var searchResultPage = this.assessmentIndex.Search(skip, top);
var model = new IndexModel(skip, top, searchResultPage);
return this.View(model);
}