I have a window service which plays a sound file at a specified time, so to do that I have taken Timer but it\'s Tick event is never fired, same is working in WinForm applic
Are you sure it's the timer that's the issue? It's extremely unusual for a windows service to access the sound system, (How would you turn it off?) it may be blocked or it may require "interaction with desktop" enabled.
Having said that, TomTom is right, Forms Timers are about being able to Marshal to the UI thread, which you don't have, rather using a Threading timer.