OperationDescription '{0}' is invalid because its Messages property contains an invalid number of MessageDescription instances. Each OperationDescription must have one or two messages.
Operation requires a transformation of the image from GDI+ to GDI. GDI does not support images with a width or height greater ...
OperationBehaviorAttribute can only go on the service class, it cannot be put on the ServiceContract interface. Method '{0}' ...
OperationContract method '{0}' in type '{1}' does not properly implement the async pattern, as more than one corresponding ...
OperationContract method '{0}' in type '{1}' does not properly implement the async pattern, as no corresponding method '{2}' ...
OperationDescription '{0}' is invalid because its Messages property contains an invalid number of MessageDescription instances. ...
OperationFormatter encountered an invalid Message body. Expected to find an attribute with name 'type' and value 'null'. ...
OperationFormatter encountered an invalid Message body. Expected to find an attribute with name 'type' and value 'object'. ...
OperationFormatter encountered an invalid Message body. Expected to find node type 'Element' with name '{0}' and namespace ...
Operations cannot contain more than one parameter when using MessageContracts for operation '{0}' in contract '{1}'. Please ...