Type 'System.Threading.Tasks.Task`1[System.String]' cannot be serialized

Question

As per the following article, I have defined my service contract as

http://blogs.msdn.com/b/endpoint/archive/2010/11/13/simplified-asynchronous-programming-model-in

Answer 1

Here is a good answer: http://mylifeandcode.blogspot.com/2012/12/the-cause-and-solution-for.html

Seems need to re-generate proxy classes - instead of "Generate task-based operations" need to choose "Generate asynchronous operations".