c# - Block thread until WCF callback is raised? -

is possible wait on callback in wcf? given this article, raise callback in wcf service, want client (a seperate application) proceed (ie go next line of code, e.g. close form etc, after callback raised. need block until callback raised.

how this?

instead of using callbacks, call service synchronously client.

if client not require data returned, return void, , client still wait call complete.