I need to be able to work out the UTC time given the local system time for any date in the year. I live in the UK and at the moment the time is GMT+1:00, however when we return to DST it will be GMT+0:00. The conversion method from local time to UTC time is therefore different depending on the time of year.

I need to calculate the time offset between local time and UTC time for any date in the year. Can anyone suggest a suitable method...

Im writing an application in C# which will be used to play media via the windows media control from a playlist. I have been able to play media through the control and use the PlayStateChange event to detect when the media has finished. All well and good.

What Id like to do however is encapsulate this functionality so that I pass a media filename to some object which then plays it and notifies me when its finished playing. I just cant...