C# Run time limit for function

what do u mean by :



I would like to break this function if after 5 seconds is not possible get the time from web."

(1) In your executing function, first get the current time of the server & store it in DateTime type variable with addition of 5 seconds.
(2) Then run a loop for comparing current time with the time already saved. And if time limit (in seconds ) exceed the stored value break the function.

You can access Win32 (using PInvoke) and then use CreateTimer API to create a timer for 5 secs, and check if your code was able to retrieve data by then
or
You can use Windows sockets functionality to get time data from the NTP server, and give your Socket code a timeout value of 5 secs.