Expression Trees and Lamda Expression can pass to WCF services as parameters
As we Know,We can't send Expression Trees and Lamda Expression as parameters via WCF services.If we have this feature we can send Predicates,Selectors,... to other project LAYERS and so beneath layers should not know very much of above layers.
Thank you for your suggestion. There is an Expression Tree Serializer (http://expressiontree.codeplex.com/) developed by the community, which may meet your request. Please let us know if you have further concern.