The task-based asynchronous OperationContract method '{0}' in type '{1}' was matched with the asynchronous OperationContract ...

The task-based asynchronous OperationContract method '{0}' in type '{1}' was matched with the asynchronous OperationContract methods '{2}' and '{3}' because they have the same operation name '{4}'. When a task-based asynchronous OperationContract method is matched to a pair of asynchronous OperationContract methods, the two OperationContracts must define the same number and types of parameters. In this case, some of the arguments are different. To fix it, ensure that the OperationContracts define the same number and types of arguments, in the same order. Alternatively, changing the name of one of the methods will prevent matching.