I'm attempting to return a generic ICollection from a REST WCF service. Should the following be possible?
[ServiceContract]
public class WebConfigurationManager {
[WebGet]
[OperationContract]
public ICollection<string> GetStrings() {
return new string[] { "A", "B", "C" };
}
}
When I attempt to execute this operation from my web browser, I get an error. Looking through my WCF trace shows me this:
Cannot serialize parameter of type 'System.String[]' (for operation 'GetStrings', contract 'WebConfigurationManager') because it is not the exact type 'System.Collections.Generic.ICollection`1[System.String]' in the method signature and is not in the known types collection. In order to serialize the parameter, add the type to the known types collection for the operation using ServiceKnownTypeAttribute.