Orchard Microdata Breadcrumbs - content-management-system

Question

I am trying to add microdata to Orchard CMS 1.8.1 breadcrumbs.
I need to add itemprop="child" to breadcrumbs.cshtml taken from /Core/Shapes/Views of which I added to my theme views folder. I works fine but it does not display the itemprop="child", I added as .Itemprop.Add("child") to the below breadcrumbs code.
But the child attribute does not show up
#{
// Model is Model.Menu from the layout (Layout.Menu)
var tag = Tag(Model, "ul");
tag.AddCssClass("breadcrumb");
var items = (IList<dynamic>)Enumerable.Cast<dynamic>(Model.Items);
if(items.Any()) {
items[0].Classes.Add("first");
items[items.Count - 1].Classes.Add("last").Itemprop.Add("child");
}
}
<nav itemscope="itemscope" itemtype="http://data-vocabulary.org/Breadcrumb">
#tag.StartElement
#* see MenuItem shape template *#
#DisplayChildren(Model)
#tag.EndElement
</nav>
I have added to MenuItemLink.cshtml in my theme views folder which gives me all the microdata for breadcrumbs but the child attribute.
<a itemprop="url" href="#Model.Href"><span itemprop="title">#Model.Text</span></a>
How or where can I add the itemprop="child" to orchard and get it working as everything is added by
#DisplayChildren(Model).

Answer 1

change
items[items.Count - 1].Classes.Add("last").Itemprop.Add("child");
to
items[items.Count - 1].Classes.Add("last");
items[items.Count - 1].Attributes.Add("itemprop", "child");
items[items.Count - 1] - it is Shape class. Classes - it is IList<string> collection classes for shape.
Attributes - it is IDictionary<string, string> collection attributes for shape.