wcf [CollectionDataContract]class in .Netcompactframework3.5

I have developed wcf service in framework 4.5. In this service, I have made a class with attribute CollectionDataContract. When I add the web reference in .Net compact framework 3.5, it shows all the classese except class with attribute CollectionDataContract.

[CollectionDataContract]publicclassClsUsersCollection:Collection<ClsUsersBO>{}//Reference added in .Net Compact Framework Smart Device ApplicationusingSmartDeviceProject8.localhost;

localhost.ClsUsersCollection Not AVAILABLE rest all classes are AVAILABLE when we write localhost.ClsA or localhost.ClsB

Any solution will be highly appreciated!

Thanks.