WCF type conversion

I am stuck with this error..can anyone point me in right direction In my WCF service ..I have a operationcontract defined as follows...

  [OperationContract]
  [FaultContract(typeof(ProductFault))]
  BusinessResponse<List<Product>> GetProductList(int id);

I am calling the above method from a console application as follows..

LookUpServiceClient client = new LookUpServiceClient();

BusinessResponse<List<Product>> response = client.GetProductList(2);

But the lines client.GetProductList(2); is underlined with Red in VS2012. If I move my mouse over it ..I get error displayed as ..

enter image description here

Solution

By default, WCF proxy generation creates arrays for all collection types. So, you can fix this problem by changing your variable assignment to this

BusinessResponse<Product[]> reponse = client.GetProductList(2);

You can also change the default collection type generated by the proxy by choosing a collection type in the Advanced Settings (Array, List, ArrayList, etc.)