C# Thread Sync example.
In visual studio, press F5 to start IIS Express Server.
type_key_to_wait_for represent the key you want to observe.
paste link(http://localhost:5796/home/type_key_to_wait_for) to browser
same_key_above same key above
response_message literally
paste link (http://localhost:5796/home/about/same_key_above/response_message)