http://developers.de/blogs/damir_dobric/archive/2007/07/03/svcutil-and-enumeration-types.aspxIf you try to create the contract with an enumeration type, it could happen that the enum-type is not properly parsed during SVCUTIL import. To make it clearer, take a look on following example: namespace Abc { [DataContract(Namespace = "http://daenet"enCommunityServer 2008 SP1 (Build: 30619.63)