When using the 3.5 version of the compact framework it is possible to connect with wcf services. This is because the CF 3.5 contains a limited subset of the wcf technology. There are several blog posts listing the wcf capabilities in CF e.g.: http://blogs.msdn.com/andrewarnottms/archive/2007/08/21/the-wcf-subset-supported-by-netcf.aspx We were researching for a mobile client to connect to a [...]