public bool CheckConnection(string IP)
{
EventHandler <CheckConnectionCompletedEventArgs> callback = null;
_systemServiceCient.Endpoint.Address = new System.ServiceModel.EndpointAddress(GenerateUri(IP));
var tcs = new TaskCompletionSource <string>();
callback = (sender, args) =>
{
RequestState state = PerformOperation(() => { tcs.SetResult(args.Result); });
if (state != RequestState.Correct)
{
tcs.SetResult("");
}
_systemServiceCient.CheckConnectionCompleted -= callback;
};
_systemServiceCient.CheckConnectionCompleted += callback;
_systemServiceCient.CheckConnectionAsync();
return(tcs.Task.Result.Equals(_testConnectionString));
}