code snippet for checkMemberGroups

Hi, I wish someone would be able to provide me code example to check transitive group membership using

checkMemberGroups

http://blogs.msdn.com/b/aadgraphteam/archive/2013/05/15/announcing-some-new-capabilities-in-azure-active-directory-graph-service.aspx

Most of the code example up there today http://msdn.microsoft.com/en-us/library/windowsazure/dn151791.aspx, shows how to invoke the query with Linq. There are some examples showing how to do "addQueryOption" as well. I was not able to construct a query programmatically and invoke it, please give me some help