OData v4.0 How can I use the support for $crossjoin?

Hello everyone,

I need to use a support for $crossjoin follow as [http://docs.oasis-open.org/odata/odata-data-aggregation-ext/v4.0/cs01/odata-data-aggregation-ext-v4.0-cs01.html#_Toc378326314]
E.g. ~/$crossjoin(Products,Sales)?$filter=Products/ID eq Sales/ProductID

I have investigated some references and source code:

Microsoft.OData [https://github.com/OData/odata.net]

System.Web.OData [https://github.com/OData/WebApi/tree/master/OData]

But I've yet to find the support for $crossjoin, the ODataPathHandler cannot parse URI to ODataPath contains $crossjoin. I'm not sure that I didn't miss any configuration.

Please give me your advice.
Thanks.